Core terms

The vocabulary of the inner life.

The concepts everyone half-knows — the unconscious, attachment, meaning, the shadow — set down in plain language, each tied to the thinkers who gave it shape.

The Unconscious

The reservoir of feelings, urges and memories that sit outside of awareness yet shape what we do.

Sigmund Freud
Milton H. Erickson
Freud · Erickson

Id, Ego & Superego

A model of the psyche as appetite, negotiator and conscience, forever in conversation.

Sigmund Freud
Anna Freud
Freud · Freud

Defense Mechanisms

The mind’s quiet strategies — denial, projection, repression — for keeping anxiety at a distance.

Sigmund Freud
Anna Freud
Freud · Freud

Transference

Redirecting feelings about people from your past onto someone in the present.

Sigmund Freud
Otto Kernberg
Freud · Kernberg

Repression

The mind's quiet way of pushing painful or unacceptable thoughts and feelings out of awareness, where they keep working unseen.

Sigmund Freud
Anna Freud
Freud · Freud

Reinforcement

Any consequence that makes a behavior more likely to happen again.

B. F. Skinner
Edward Thorndike
Skinner · Thorndike

Punishment

An unwelcome consequence that follows a behavior and makes it less likely to happen again.

B. F. Skinner
Skinner

Shaping

Guiding someone toward a new behavior step by step, rewarding each small move that brings them closer to the goal.

B. F. Skinner
Skinner

Schedules Of Reinforcement

The timing and pattern of rewards — steady or unpredictable — that quietly determines how strongly a habit takes hold.

B. F. Skinner
Skinner

Operant Conditioning

Behavior is shaped by its consequences — what gets rewarded gets repeated.

B. F. Skinner
Skinner

Core Beliefs & Schemas

Deep rules about self, others and the world, often written in childhood.

Jean Piaget
Aaron Beck
Frederic Bartlett
Ulric Neisser
Piaget · Beck · Bartlett · Neisser

Assimilation

Making sense of something new by fitting it into the ideas and patterns we already carry in our minds.

Jean Piaget
Piaget

Accommodation

Reshaping our existing ideas when the world surprises us and our old way of understanding no longer fits.

Jean Piaget
Piaget

Constructivism

The view that we don't simply absorb knowledge but actively build our own understanding through experience.

Jean Piaget
Piaget

Basic Anxiety

Horney’s sense of feeling small and alone in a world that feels potentially hostile.

Karen Horney
Horney

Neurotic Needs

The cravings — for approval, for love, for power or perfection — that we lean on too hard when early life left us feeling unsafe, until they quietly run our lives.

Karen Horney
Horney

The Tyranny of the Should

The relentless inner list of how we ought to be — flawless, tireless, endlessly kind — that punishes us for falling short of an impossible standard.

Karen Horney
Horney

Real vs. Idealized Self

The tension between who you authentically are and the perfect self you feel you should be.

Karen Horney
Horney

The Idealized Self

The polished, perfect version of ourselves we imagine we must become, which slowly crowds out the real and ordinary person we actually are.

Karen Horney
Horney

Introspection

The careful, disciplined practice of looking inward to observe and report your own thoughts, sensations, and feelings as they happen.

Wilhelm Wundt
Wundt

Sensation

The raw, immediate experience that arrives through the senses—a color, a sound, a touch—before the mind has made sense of it.

Wilhelm Wundt
Wundt

Apperception

The moment when something we notice is gathered into the clear center of attention and woven together with what we already know.

Wilhelm Wundt
Wundt

Consciousness

The ongoing stream of awareness in which everything we perceive, feel, and think comes together as our experience of the present.

Wilhelm Wundt
Wundt

Archetypes

Universal patterns — the Mother, the Hero, the Trickster — that recur across human imagination.

Carl Jung
Jung

The Shadow

The disowned parts of ourselves we’d rather not see — and must, to become whole.

Carl Jung
Jung

Persona

The social face we present to the world—the mask of roles and manners that lets us meet others while shielding what lies beneath.

Carl Jung
Jung

Individuation

The lifelong work of becoming the whole, distinct person you already are underneath.

Carl Jung
Jung

Collective Unconscious

A shared, inherited layer of the psyche holding humanity’s common symbols.

Carl Jung
Jung

Stream of Consciousness

James’ image of the mind as a flowing river of thought, never the same twice.

William James
James

Habit

The grooves of repeated action that make character — “the great flywheel of society.”

William James
James

The Self

The sense of being a continuous person—the one who remembers, acts, and knows themselves as the same 'I' across a lifetime.

William James
James

Will

The inner capacity to choose and commit to an action, holding attention on what we mean to do until we actually do it.

William James
James

Inferiority

The deep-seated feeling of falling short or being small that begins in childhood and quietly shapes how we strive through life.

Alfred Adler
Adler

Compensation

The effort to make up for a felt weakness by building strength somewhere else, turning a sense of lack into a source of growth.

Alfred Adler
Adler

Lifestyle

The unique, often unspoken pattern of goals and beliefs we form early on and carry as our personal way of moving through the world.

Alfred Adler
Adler

Social Interest

The natural sense of belonging and care for others that draws us out of ourselves and toward the wider human community.

Alfred Adler
Adler

Splitting

The mind's habit of seeing someone or something as all good or all bad, because holding both at once feels too hard to bear.

Melanie Klein
Otto Kernberg
Klein · Kernberg

Object Relations

The inner cast of important people we carry within us, formed early in life, that quietly shapes how we expect closeness and connection to feel.

Melanie Klein
Klein

Projective Identification

A way of placing a feeling we can't hold into another person, so that they begin to feel it too and act it out on our behalf.

Melanie Klein
Klein

Depressive Position

The hard-won maturity of recognizing that the people we love are whole and imperfect, holding both their good and bad sides together with care.

Melanie Klein
Klein

Transitional Object

The beloved blanket, teddy, or tune a child clings to — neither fully "me" nor fully "the world," it lives in the in-between space where comfort, play, and imagination first take hold.

Donald Winnicott
Winnicott

True Self & False Self

The spontaneous, feeling core we are born with — and the compliant mask that can grow over it when we must please others to stay safe. Winnicott saw health as living from the true self.

Donald Winnicott
Winnicott

Good-Enough Mother

Care that is reliable without being perfect. By meeting a baby's needs closely at first and then gently failing in small, bearable ways, a caregiver helps the child learn to trust and to be separate.

Donald Winnicott
Winnicott

Holding Environment

The reliable, safe surround — physical and emotional — that lets a person relax and simply be. First a caregiver's arms and attention; later, the steady frame a therapist offers a client.

Donald Winnicott
Winnicott

Conditioning

The way experience teaches us to respond, as a once-neutral signal comes to trigger a reaction through repeated pairing.

John B. Watson
Ivan Pavlov
Watson · Pavlov

Stimulus

Any signal from the world around us — a sound, a sight, a touch — that can prompt a reaction in the body or mind.

John B. Watson
Watson

Response

The reaction a person or animal gives when something in the world acts upon them, from a reflex to a learned habit.

John B. Watson
Watson

Environment

The surroundings and experiences that shape who we become, which Watson believed mattered far more than inborn nature.

John B. Watson
Watson

Sublimation

The way the mind can channel a difficult or forbidden urge into something useful or creative, turning raw feeling into work, art, or care.

Anna Freud
Edith Kramer
Freud · Kramer

Identification

The quiet process of taking in qualities of someone we admire or depend on, so that parts of them become part of who we are.

Anna Freud
Freud

Law Of Effect

The simple principle that actions followed by a pleasing result tend to be repeated, while those followed by discomfort tend to fade.

Edward Thorndike
Thorndike

Trial And Error

Learning by attempting, stumbling, and adjusting — slowly keeping what works and letting go of what doesn't.

Edward Thorndike
Thorndike

Transfer Of Learning

The way a skill learned in one setting carries over to another, but only when the two situations truly share something in common.

Edward Thorndike
Thorndike

Extinction

The gradual fading of a learned response once the signal that taught it is no longer followed by what we came to expect.

Ivan Pavlov
Pavlov

Generalization

The tendency for a response learned to one signal to spread to others that resemble it, so similar cues stir a similar reaction.

Ivan Pavlov
Pavlov

Reflex

An automatic, built-in response of the body to a stimulus—like a flinch or a blink—that happens before any thought is involved.

Ivan Pavlov
Pavlov

Self-Actualization

Becoming everything you are capable of becoming — the top of Maslow’s pyramid.

Carl Rogers
Abraham Maslow
Rogers · Maslow

Congruence

When your outer expression matches your inner experience. Being genuinely yourself.

Carl Rogers
Rogers

Empathy

The act of truly sensing another person's inner world as if it were your own, while never losing sight of the fact that it isn't.

Carl Rogers
Rogers

Unconditional Positive Regard

Accepting a person fully, without conditions — the soil in which change can grow.

Carl Rogers
Rogers

Self-Concept

The picture we hold of who we are — the steady sense of self woven from how we see ourselves and how others have seen us.

Carl Rogers
Rogers

Hierarchy of Needs

From safety to belonging to esteem to growth — a ladder of human motivation.

Abraham Maslow
Salvador Minuchin
Maslow · Minuchin

Peak Experiences

Rare moments of awe and wholeness that feel timeless and complete.

Abraham Maslow
Maslow

Growth Needs

The deeper longings — for meaning, beauty, and becoming fully ourselves — that stir once our basic needs are met.

Abraham Maslow
Maslow

Identity Crisis

The unsettled, searching period — often in youth — when a person works to discover who they really are and where they belong.

Erik Erikson
Erikson

Trust vs. Mistrust

The earliest chapter of life, in which a baby learns from steady, caring attention whether the world is a place that can be relied upon.

Erik Erikson
Erikson

Generativity

The midlife pull to give something back — to raise, mentor, build, or create things that will outlast you and serve the next generation.

Erik Erikson
Erikson

Ego Integrity

The quiet sense, arriving in later life, that one's days have added up to a whole worth having lived — and can be met with acceptance rather than regret.

Erik Erikson
Erikson

Attachment Styles

Secure, anxious, avoidant — the early templates for how we bond and seek closeness.

Mary Ainsworth
John Bowlby
Gerald Klerman
Sue Johnson
Ainsworth · Bowlby · Klerman · Johnson & more

The Secure Base

A trusted figure from which we venture out and to which we safely return.

Mary Ainsworth
John Bowlby
Ainsworth · Bowlby

The Strange Situation

A gentle laboratory scene of brief partings and reunions, designed to reveal how a young child draws on a parent as a safe base in an unfamiliar room.

Mary Ainsworth
Ainsworth

Caregiver Sensitivity

A parent's knack for noticing what a child is feeling and responding to it warmly and in time — the soil in which secure attachment tends to grow.

Mary Ainsworth
Ainsworth

Cognitive Distortions

Habitual thinking traps — catastrophizing, all-or-nothing — that bend reality.

Aaron Beck
Frederic Bartlett
Beck · Bartlett

Automatic Thoughts

The instant, unbidden interpretations that flash up before you notice them.

Aaron Beck
Beck

The Cognitive Triad

The three dark lenses of depression — a bleak view of oneself, of the world, and of the future — that color everything they touch.

Aaron Beck
Beck

Testing the Evidence

The practice of treating an upsetting thought as a claim to be examined rather than a fact to be obeyed, and asking what the evidence actually shows.

Aaron Beck
Beck

The Zone of Proximal Development

The fertile space between what a learner can do alone and what they can do with a little help — where real growth happens.

Lev Vygotsky
Vygotsky

Scaffolding

The supportive guidance a teacher or parent offers while a skill is still wobbly, gradually withdrawn as the learner grows steady on their own.

Lev Vygotsky
Vygotsky

Cultural Tools

The inherited instruments of thought — language, numbers, maps, stories — that a culture hands its children to help them make sense of the world.

Lev Vygotsky
Vygotsky

Internalization

The way a child takes the voices and methods first shared with others and gradually makes them part of their own private thinking.

Lev Vygotsky
Vygotsky

Self-Efficacy

The quiet belief that you can do the thing in front of you — the confidence that shapes whether you even try.

Albert Bandura
Bandura

Modeling

The deeply human way we learn by watching others, picking up habits, skills, and attitudes simply by seeing them lived out.

Albert Bandura
Bandura

Reciprocal Determinism

The idea that who you are, how you act, and the world around you are constantly shaping one another, so none of them is simply the cause or the effect.

Albert Bandura
Bandura

Agency

The sense that you are an active doer in your own life, able to make choices and influence what happens rather than only being carried along by events.

Albert Bandura
Bandura

Internal Working Model

The inner blueprint, built from our earliest bonds, that tells us what to expect from others and whether we can count on being met with care.

John Bowlby
Bowlby

Separation Anxiety

The distress we feel when apart from someone we depend on, a natural signal of how deeply attachment matters to us.

John Bowlby
Bowlby

ABC Model

The insight that it isn't events themselves but the beliefs we hold about them that shape how we end up feeling and acting.

Albert Ellis
Ellis

Irrational Beliefs

The rigid demands and absolutes we quietly tell ourselves—musts, shoulds, and catastrophes—that turn ordinary setbacks into lasting distress.

Albert Ellis
Ellis

Disputation

The practice of gently challenging our harshest beliefs, asking whether they are really true and trading them for ones that serve us better.

Albert Ellis
Ellis

Unconditional Self-Acceptance

The choice to value yourself as a whole person regardless of your flaws or failures, rather than rating your worth by your performance.

Albert Ellis
Ellis

The Will to Meaning

Frankl’s claim that our primary drive is not pleasure or power, but meaning.

Viktor Frankl
Irvin D. Yalom
Frankl · Yalom

Will To Meaning

The deep human drive to find purpose in our lives, which can sustain us even through hardship and suffering.

Viktor Frankl
Frankl

Responsibility

The understanding that we are answerable for how we respond to life, free in every situation to choose our own stance toward it.

Viktor Frankl
Frankl

Existential Vacuum

The hollow, bored or restless feeling when life seems to lack purpose.

Viktor Frankl
Frankl

Freedom

The capacity to shape our own lives through the choices we make—a gift that, as Rollo May and Erich Fromm both knew, can feel as heavy as it is liberating.

Rollo May
Erich Fromm
Irvin D. Yalom
May · Fromm · Yalom

Anxiety

The unease we feel when something we value—our security, our sense of self, our very existence—seems under threat, and which Rollo May saw not as mere illness but as a signal that we are alive and facing a choice.

Rollo May
May

Courage

The willingness to act and to commit even while doubt and fear are still present, which Rollo May considered the quiet foundation that makes every other virtue possible.

Rollo May
May

Existential Guilt

The honest ache we feel when we sense we have left some part of our own potential unlived, which Rollo May understood not as a flaw to erase but as a call to live more fully.

Rollo May
May

Alienation

The sense of being cut off—from other people, from our own work, and even from ourselves—that Erich Fromm saw as a hidden cost of modern life.

Erich Fromm
Fromm

Relatedness

Our deep need to feel connected to others and to belong, which Erich Fromm regarded as one of the most basic hungers of being human.

Erich Fromm
Fromm

Productive Love

Love understood by Erich Fromm not as a feeling that simply happens to us but as an active practice of care, respect, knowledge, and responsibility for another person.

Erich Fromm
Fromm

Field Theory

Kurt Lewin's idea that to understand someone's behavior we must look at the whole field of forces acting on them in the present moment, not just their past or their personality alone.

Kurt Lewin
Lewin

Life Space

Kurt Lewin's name for the total world as a person experiences it—everything, real or imagined, that influences how they think, feel, and act right now.

Kurt Lewin
Lewin

Force Field

Kurt Lewin's picture of any situation as a balance between the forces pushing us toward change and those holding us back, so that lasting change often means easing the resistance rather than simply pushing harder.

Kurt Lewin
Lewin

Group Dynamics

The study, pioneered by Kurt Lewin, of how people influence one another within a group and how the group itself takes on a life and momentum of its own.

Kurt Lewin
Lewin

Cognitive Dissonance

The uncomfortable tension Leon Festinger described that arises when our beliefs and our actions don't line up, nudging us to change one or the other to feel whole again.

Leon Festinger
Festinger

Social Comparison

Leon Festinger's observation that, lacking an objective measure, we come to understand our own abilities and opinions by comparing ourselves with the people around us.

Leon Festinger
Festinger

Justification

The way we quietly explain our choices to ourselves so they feel right—a process Leon Festinger showed can lead us to value most what cost us the most to obtain.

Leon Festinger
Festinger

Belief Change

How a person comes to revise what they hold to be true, which Leon Festinger studied closely—finding that strongly held beliefs can grow even firmer when the evidence turns against them.

Leon Festinger
Festinger

Conformity

The pull to align our judgments and behavior with those of the group, which Solomon Asch famously revealed can lead people to doubt even what they plainly see with their own eyes.

Solomon Asch
Asch

Group Pressure

The quiet pull we feel to go along with the people around us, even when our own eyes or judgment say otherwise.

Solomon Asch
Asch

Majority Influence

The way a larger group can sway what an individual says, thinks, or does simply by agreeing among themselves.

Solomon Asch
Asch

Impression Formation

How we piece together a whole sense of another person from just a handful of traits, with some qualities coloring all the rest.

Solomon Asch
Asch

Obedience

Our tendency to follow the commands of someone we see as in charge, sometimes even when those commands trouble our conscience.

Stanley Milgram
Milgram

Authority

The figures and institutions we treat as having the right to direct us, and the deference we readily grant them.

Stanley Milgram
Milgram

Agentic State

The mental shift in which a person stops feeling responsible for their actions and sees themselves merely as carrying out another's wishes.

Stanley Milgram
Milgram

Situational Pressure

The force of circumstances themselves, which can push ordinary people toward behavior they would never have chosen on their own.

Stanley Milgram
Milgram

Role

The part we are handed in a given setting, which can quietly reshape how we act once we step into it.

Philip Zimbardo
Zimbardo

Deindividuation

The loosening of our usual sense of self within a crowd or uniform, which can free people to act in ways they otherwise would not.

Philip Zimbardo
Zimbardo

Situation

The setting and conditions around us, whose power over behavior we tend to underestimate in favor of blaming character.

Philip Zimbardo
Zimbardo

Bystander Effect

The surprising way people grow less likely to step in and help as the number of onlookers grows.

Philip Zimbardo
Zimbardo

Traits

The stable, recurring patterns in how a person thinks, feels, and behaves that lend each of us a recognizable character.

Gordon Allport
Allport

Cardinal Traits

The rare, dominant qualities so central to a person that nearly everything they do seems to flow from them.

Gordon Allport
Allport

Proprium

The warm, felt core of selfhood — all the parts of experience a person recognizes as truly their own.

Gordon Allport
Allport

Contact Hypothesis

The idea that bringing different groups together under the right conditions can soften prejudice and build understanding between them.

Gordon Allport
Allport

Factor Analysis

A statistical method for finding the few hidden traits that explain why many different test scores tend to rise and fall together.

Raymond Cattell
Charles Spearman
Cattell · Spearman

Source Traits

The deep, underlying factors of personality that give rise to the many surface qualities we observe in everyday behavior.

Raymond Cattell
Cattell

Fluid Intelligence

The ability to reason, see patterns, and solve unfamiliar problems on the spot, without relying on what you already know.

Raymond Cattell
Cattell

Crystallized Intelligence

The store of knowledge, skills, and vocabulary you gather over a lifetime and draw on to make sense of the world.

Raymond Cattell
Cattell

Temperament

The inborn emotional style that colors how a person reacts to the world, present from early in life and fairly steady over the years.

Hans Eysenck
Jerome Kagan
Eysenck · Kagan

Extraversion

A personality dimension describing how much a person seeks out company, stimulation, and the lively energy of the outside world.

Hans Eysenck
Eysenck

Neuroticism

A personality dimension describing how readily a person feels anxiety, worry, and other unsettling emotions.

Hans Eysenck
Eysenck

Psychoticism

A personality dimension describing a tougher, more aloof and unconventional streak that can shade into impulsiveness or disregard for others.

Hans Eysenck
Eysenck

Mental Age

A way of describing a child's thinking ability by the age group whose typical performance it matches, rather than by their birthday.

Alfred Binet
Binet

Intelligence Test

A set of standardized tasks designed to gauge a person's reasoning and problem-solving ability and compare it with others'.

Alfred Binet
Binet

Individual Differences

The study of how and why people reliably differ from one another in abilities, traits, and ways of thinking.

Alfred Binet
Binet

Psychological Assessment

The careful process of measuring a person's abilities, traits, or difficulties using tests, observation, and interviews.

Alfred Binet
Binet

Working Memory

The mind's small mental workspace where you hold and juggle a handful of things just long enough to use them.

David Wechsler
George A. Miller
Wechsler · Miller

Intelligence Quotient (IQ)

A single score that places a person's measured intelligence in relation to others of the same age.

David Wechsler
Wechsler

Processing Speed

How quickly a person can take in simple information and respond to it, a quiet measure of mental efficiency.

David Wechsler
Wechsler

Verbal Comprehension

The ability to understand words and ideas expressed in language and to reason with them.

David Wechsler
Wechsler

Correlation

A measure of how closely two things move together, telling you whether they tend to rise and fall in step.

Charles Spearman
Spearman

General Intelligence (g)

Charles Spearman's idea that a single underlying mental ability runs through all our different skills, so people who do well at one kind of task tend to do well at others.

Charles Spearman
Spearman

Specific Ability

The particular talent a single task draws on by itself, such as a knack for words or numbers, that sits alongside our broader general intelligence.

Charles Spearman
Spearman

The Forgetting Curve

Hermann Ebbinghaus's discovery that memory fades fastest in the first hours after learning and then slows, charting how quickly we let things slip away.

Hermann Ebbinghaus
Ebbinghaus

The Spacing Effect

The finding that we remember far more when we spread our study out over time than when we cram it all into one sitting.

Hermann Ebbinghaus
Ebbinghaus

Savings

The hidden trace of something once learned, measured by how much faster we relearn it the second time even after we think we have forgotten it.

Hermann Ebbinghaus
Ebbinghaus

Repetition

The simple act of going over material again and again, which Ebbinghaus showed gradually carves a memory deeper and makes it last.

Hermann Ebbinghaus
Ebbinghaus

Gestalt

The principle that the mind grasps a whole pattern at once rather than building it from separate parts, so the whole is more than the sum of its pieces.

Max Wertheimer
Wolfgang Kohler
Wertheimer · Kohler

Insight

The sudden moment when a problem rearranges itself in the mind and the answer simply appears, often after a stretch of being stuck.

Max Wertheimer
Wolfgang Kohler
Wertheimer · Kohler

The Phi Phenomenon

The illusion of movement we see when still images flash in quick succession, the trick of the eye that makes film and animation feel alive.

Max Wertheimer
Wertheimer

Perceptual Organization

The way the mind quietly groups what we see into shapes, figures, and patterns before we even notice it is doing so.

Max Wertheimer
Wertheimer

Perception

The mind's act of making sense of what reaches the senses, turning raw light and sound into a meaningful picture of the world.

Wolfgang Kohler
Ulric Neisser
Kohler · Neisser

Restructuring

The mental shift of seeing a problem in a new way, where the pieces stay the same but suddenly fit together differently.

Wolfgang Kohler
Kohler

Reconstructive Memory

Frederic Bartlett's insight that remembering is less like replaying a recording and more like rebuilding a story, shaped each time by what we expect and believe.

Frederic Bartlett
Bartlett

Gist

The overall meaning of an experience that we tend to keep, even as the exact details quietly fade or rearrange themselves over time.

Frederic Bartlett
Bartlett

Chunking

The mind's way of grouping small pieces of information into larger, meaningful units, so a long string of digits becomes a handful of familiar clusters we can actually hold.

George A. Miller
Miller

The Magical Number Seven

George Miller's famous observation that our short-term memory can juggle only about seven items at once, give or take two, before things start slipping away.

George A. Miller
Miller

Planning

The mind's ability to imagine a goal and lay out the steps to reach it, holding a future in view and shaping action toward it.

George A. Miller
Miller

Cognition

The whole quiet machinery of the mind at work — perceiving, remembering, reasoning, and making sense of the world around us.

Ulric Neisser
Neisser

Ecological Validity

The idea that to truly understand the mind we should study it in the messy settings of everyday life, not only in the tidy isolation of the laboratory.

Ulric Neisser
Neisser

Universal Grammar

Noam Chomsky's proposal that every human is born with a deep, shared blueprint for language, which is why children everywhere learn to speak with such ease.

Noam Chomsky
Chomsky

Linguistic Competence

The silent, underlying knowledge of a language a speaker carries within — the rules they grasp intuitively, even when they could never spell them out.

Noam Chomsky
Chomsky

Linguistic Performance

Language as it actually comes out in the moment — the real sentences we speak, complete with the pauses, slips, and stumbles of everyday talk.

Noam Chomsky
Chomsky

Language Acquisition Device

Chomsky's idea of an inborn mental faculty that lets a child take in the speech around them and, almost effortlessly, work out the grammar beneath it.

Noam Chomsky
Chomsky

Anchoring

The way a first number or piece of information we encounter tugs at our judgment, pulling later estimates toward it even when it has no real bearing.

Daniel Kahneman
Amos Tversky
Kahneman · Tversky

Availability Heuristic

Our habit of judging how likely something is by how easily examples spring to mind, so vivid or recent events can feel far more common than they are.

Daniel Kahneman
Amos Tversky
Kahneman · Tversky

System 1

The fast, automatic, intuitive part of thinking that jumps to conclusions in an instant, often before we've noticed we were thinking at all.

Daniel Kahneman
Kahneman

System 2

The slow, effortful, deliberate side of the mind — the careful reasoning we summon when a problem demands real attention and patience.

Daniel Kahneman
Kahneman

Loss Aversion

Our deep tendency to feel the sting of a loss far more sharply than the pleasure of an equal gain, which quietly shapes the choices we make.

Daniel Kahneman
Kahneman

Representativeness Heuristic

The mental shortcut of judging something by how closely it resembles a familiar type, which can lead us to ignore plainer facts about how likely it really is.

Amos Tversky
Tversky

Framing Effect

How the very same choice can feel different depending on the words it's wrapped in, so a decision can shift simply because of how the options are described.

Amos Tversky
Tversky

Base Rate

The background frequency of something in the world — how common it actually is — which we tend to ignore when a vivid detail or stereotype pulls our attention away.

Amos Tversky
Tversky

Suggestibility

Our tendency to absorb hints, leading questions, and others' accounts into our own memories, gradually mistaking what was suggested for what we lived.

Elizabeth Loftus
Ernest R. Hilgard
Loftus · Hilgard

False Memory

A recollection that feels real and certain yet describes something that never happened, showing how memory rebuilds the past rather than simply replaying it.

Elizabeth Loftus
Loftus

Misinformation Effect

The way misleading details encountered after an event can quietly rewrite a person's memory of what they originally saw.

Elizabeth Loftus
Loftus

Eyewitness Memory

What a witness recalls of an event — confident and compelling, yet far more fragile and open to distortion than courts and juries once assumed.

Elizabeth Loftus
Loftus

Flow

Complete absorption in a challenge that perfectly meets your skill — time disappears.

Mihaly Csikszentmihalyi
Csikszentmihalyi

Challenge-Skill Balance

The sweet spot where a task stretches your abilities just enough — hard enough to hold your attention, but not so hard it overwhelms — where absorption tends to bloom.

Mihaly Csikszentmihalyi
Csikszentmihalyi

Autotelic Experience

An activity worth doing for its own sake, where the doing itself is the reward rather than any prize waiting at the end.

Mihaly Csikszentmihalyi
Csikszentmihalyi

Optimal Experience

Those rare, fully engaged moments when attention, action, and enjoyment align — the state Csikszentmihalyi called flow.

Mihaly Csikszentmihalyi
Csikszentmihalyi

Learned Helplessness

The resigned belief, formed after repeated uncontrollable setbacks, that nothing you do will matter — so you stop trying even when escape becomes possible.

Martin Seligman
Seligman

Explanatory Style

The habitual story we tell ourselves about why good and bad things happen, which shapes whether setbacks feel temporary and local or permanent and all-encompassing.

Martin Seligman
Seligman

PERMA

Seligman's five building blocks of a flourishing life — positive emotion, engagement, relationships, meaning, and accomplishment.

Martin Seligman
Seligman

Resilience

The capacity to bend under hardship without breaking, recovering and even growing through adversity rather than being defined by it.

Martin Seligman
Seligman

Ethics of Care

A way of thinking about right and wrong that begins with relationships and responsibility to others, rather than with abstract rules and rights.

Carol Gilligan
Gilligan

Voice

A person's authentic way of speaking their own experience and moral concerns — and the harm done when that voice is silenced or unheard.

Carol Gilligan
Gilligan

Moral Reasoning

How people think through questions of right and wrong, weighing what they owe to themselves and to one another when values collide.

Carol Gilligan
Gilligan

Justice and Care

Two voices in moral life — one reasoning through fairness and rules, the other through relationships and compassion — which Gilligan argued belong together.

Carol Gilligan
Gilligan

Two-Factor Theory of Emotion

Emotion results from physiological arousal plus a cognitive interpretation of the situation.

Stanley Schachter
Schachter

Misattribution of Arousal

Mistaking the source of bodily arousal and assigning it to the wrong cause.

Stanley Schachter
Schachter

Affiliation Under Anxiety

The tendency to seek others, especially similar others, when anxious or uncertain.

Stanley Schachter
Schachter

Drive

An internal motivational state that pushes behavior toward reduction or satisfaction.

Neal E. Miller
Miller

Approach-Avoidance Conflict

A situation where the same goal carries both attractive and threatening qualities.

Neal E. Miller
Miller

Biofeedback

Using feedback about bodily processes to learn partial voluntary control over them.

Neal E. Miller
Miller

Need for Achievement

A motive to meet standards of excellence and accomplish challenging goals.

David C. McClelland
McClelland

Need for Power

A motive to influence, impact or have authority over others or events.

David C. McClelland
McClelland

Need for Affiliation

A motive for warm, close and approving relationships with others.

David C. McClelland
McClelland

Hebbian Learning

Learning as the strengthening of connections between neurons that are active together.

Donald O. Hebb
Hebb

Cell Assembly

A network of neurons linked through repeated co-activation that can represent a perception, thought or action.

Donald O. Hebb
Hebb

Sensory Deprivation

Reduced sensory input that affects cognition, emotion and arousal.

Donald O. Hebb
Hebb

Drive Reduction

Behavior is motivated by internal drives and reinforced when those drives are reduced.

Clark L. Hull
Hull

Habit Strength

The learned strength of a stimulus-response connection built through reinforcement.

Clark L. Hull
Hull

Reaction Potential

The likelihood or strength of a response, based on factors such as drive and habit strength.

Clark L. Hull
Hull

Behavioral Inhibition

A tendency to withdraw, pause or show caution in unfamiliar situations.

Jerome Kagan
Kagan

High Reactivity

A strong biological and emotional response to new or intense stimuli.

Jerome Kagan
Kagan

Delay of Gratification

The ability to postpone an immediate reward for a larger or more valued future one.

Walter Mischel
Mischel

If-Then Signature

A stable pattern in which a person behaves one way in one situation and differently in another.

Walter Mischel
Mischel

Hot and Cool Systems

A hot emotional system drives impulse; a cool cognitive system supports reflection and control.

Walter Mischel
Mischel

Contact Comfort

Comfort and security gained from warm physical closeness to an attachment figure.

Harry F. Harlow
Harlow

Maternal Deprivation

The loss or absence of adequate early caregiving and affection.

Harry F. Harlow
Harlow

Social Isolation

A lack of normal social contact during development.

Harry F. Harlow
Harlow

Divergent Thinking

Generating many possible answers or ideas from a single prompt.

J.P. Guilford
Guilford

Convergent Thinking

Narrowing possibilities toward the single best or correct answer.

J.P. Guilford
Guilford

Structure of Intellect

A model classifying intellectual abilities by operations, contents and products.

J.P. Guilford
Guilford

Discovery Learning

Learning by actively exploring and discovering principles rather than receiving facts passively.

Jerome S. Bruner
Bruner

Spiral Curriculum

Returning to core ideas repeatedly at increasing levels of complexity.

Jerome S. Bruner
Bruner

Modes of Representation

Knowledge can be represented through action, images or symbols.

Jerome S. Bruner
Bruner

Neodissociation

A theory that hypnosis can divide consciousness into partly separate control or monitoring systems.

Ernest R. Hilgard
Hilgard

Hidden Observer

A proposed observing part of the mind that can report experiences outside main awareness.

Ernest R. Hilgard
Hilgard

Preconventional Morality

Moral reasoning based mainly on punishment, reward and personal consequences.

Lawrence Kohlberg
Kohlberg

Conventional Morality

Moral reasoning based on rules, approval, duty and social order.

Lawrence Kohlberg
Kohlberg

Postconventional Morality

Moral reasoning based on principles, rights and universal ethical commitments.

Lawrence Kohlberg
Kohlberg

Quasi-Experiment

A study estimating causal effects without full random assignment.

Donald T. Campbell
Campbell

Internal Validity

The degree to which a study supports a causal conclusion within its design.

Donald T. Campbell
Campbell

External Validity

The degree to which findings generalize beyond the specific study context.

Donald T. Campbell
Campbell

Mean Length of Utterance

A measure of early language development based on average utterance length, often in morphemes.

Roger Brown
Brown

Telegraphic Speech

Early child speech that uses key content words while omitting many grammatical markers.

Roger Brown
Brown

Tip-of-the-Tongue State

A retrieval experience where a person feels they know a word but cannot fully access it.

Roger Brown
Brown

Mere Exposure Effect

Repeated exposure to a stimulus can increase liking for it.

R.B. Zajonc
Zajonc

Affective Primacy

Affect or preference can occur before conscious cognitive evaluation.

R.B. Zajonc
Zajonc

Social Facilitation

The presence of others affects performance, often improving simple tasks and impairing difficult ones.

R.B. Zajonc
Zajonc

Episodic Memory

Memory for personally experienced events situated in time and place.

Endel Tulving
Tulving

Semantic Memory

General knowledge of facts, concepts and meanings independent of a specific episode.

Endel Tulving
Tulving

Encoding Specificity

Memory retrieval is best when cues at recall match the information present during encoding.

Endel Tulving
Tulving

Bounded Rationality

Human rationality is limited by information, time, attention and cognitive capacity.

Herbert A. Simon
Simon

Satisficing

Choosing an option that is good enough rather than optimal.

Herbert A. Simon
Simon

Problem Space

The set of possible states, actions and paths involved in solving a problem.

Herbert A. Simon
Simon

Correspondent Inference

Inferring a person's stable disposition from their observed behavior.

Edward E. Jones
Jones

Fundamental Attribution Error

Overemphasizing personal traits and underemphasizing situations when explaining others' behavior.

Edward E. Jones
Jones

Ingratiation

Self-presentation behavior aimed at gaining approval or liking.

Edward E. Jones
Jones

Semantic Differential

A rating method using bipolar adjective scales to measure the connotative meaning of concepts.

Charles E. Osgood
Osgood

Connotative Meaning

The emotional and evaluative associations a concept carries beyond its literal definition.

Charles E. Osgood
Osgood

Evaluation-Potency-Activity

Three broad dimensions used to organize meanings: good-bad, strong-weak and active-passive.

Charles E. Osgood
Osgood

Associative Network

Memory as a network of linked concepts, emotions and experiences.

Gordon H. Bower
Bower

Mood-Congruent Memory

The tendency to recall memories that match one's current mood.

Gordon H. Bower
Bower

Mental Imagery

Using internal images to represent and rehearse information or experience.

Gordon H. Bower
Bower

Covariation Model

A model of attribution using consensus, distinctiveness and consistency to infer causes.

Harold H. Kelley
Kelley

Consensus

Whether other people behave similarly in the same situation.

Harold H. Kelley
Kelley

Interdependence

A relationship structure where each person's outcomes are affected by the other's actions.

Harold H. Kelley
Kelley

Split-Brain

A condition and research paradigm involving disconnection of the cerebral hemispheres, usually by cutting the corpus callosum.

Roger W. Sperry
Sperry

Cerebral Lateralization

The specialization of functions in the left and right hemispheres of the brain.

Roger W. Sperry
Sperry

Emergent Mind

The idea that mental properties emerge from organized brain processes and can influence behavior.

Roger W. Sperry
Sperry

Cognitive Map

An internal representation of spatial or relational structure used to guide behavior.

Edward C. Tolman
Tolman

Latent Learning

Learning that occurs without immediate reward and becomes visible when motivation appears.

Edward C. Tolman
Tolman

Purposive Behaviorism

A behaviorist approach that treats behavior as goal-directed and guided by expectations.

Edward C. Tolman
Tolman

Cronbach's Alpha

A statistic estimating the internal consistency of a scale or test.

Lee J. Cronbach
Cronbach

Validity

The degree to which evidence supports the interpretation and use of test scores.

Lee J. Cronbach
Cronbach

Aptitude-Treatment Interaction

Different people may benefit from different methods depending on their aptitudes.

Lee J. Cronbach
Cronbach

Mindfulness

Paying attention to the present moment, on purpose and without judgment.

Marsha Linehan
Zindel Segal
Mark Williams
John Teasdale
Linehan · Segal · Williams · Teasdale & more

Radical acceptance

Fully accepting reality as it is, to stop suffering over what cannot be changed.

Marsha Linehan
Linehan

Emotion regulation

Skills for understanding, naming and shifting the intensity of strong feelings.

Marsha Linehan
Linehan

Psychological flexibility

Staying open and present while acting on your values, even with hard feelings.

Steven C. Hayes
Kirk Strosahl
Kelly Wilson
Hayes · Strosahl · Wilson

Values

The directions you most want your life to move toward.

Steven C. Hayes
Kelly Wilson
Hayes · Wilson

Acceptance

Making room for difficult thoughts and feelings instead of struggling against them.

Steven C. Hayes
Hayes

Decentering

Standing back to watch thoughts as passing events, not facts about you.

Zindel Segal
Mark Williams
John Teasdale
Segal · Williams · Teasdale

Rumination

Getting stuck in repetitive, brooding loops of negative thought.

Zindel Segal
Segal

Body scan

Slowly moving attention through the body, part by part.

Jon Kabat-Zinn
Kabat-Zinn

Trauma

A distressing event whose memory stays raw and intrudes on the present.

Francine Shapiro
Shapiro

Reprocessing

Helping a stuck memory move into normal, less charged storage.

Francine Shapiro
Shapiro

Role transition

A life change — new job, parenthood, loss — that strains how you function.

Gerald Klerman
Myrna Weissman
Klerman · Weissman

Awareness

Full contact with what you are sensing, feeling and doing right now.

Laura Perls
Leslie Greenberg
Perls · Greenberg

Unfinished business

Feelings and situations left incomplete that keep pulling at the present.

Laura Perls
Perls

Emotion

An adaptive signal carrying information about needs and meaning.

Leslie Greenberg
Robert Elliott
Greenberg · Rice · Elliott

Bonding

The cycle of reaching for a partner and being responded to with safety.

Sue Johnson
Johnson

Schema mode

The emotional state or "part" that takes over in a given moment.

Jeffrey Young
Young

Core emotional needs

Childhood needs for safety, connection and autonomy that, unmet, form schemas.

Jeffrey Young
Young

Mentalizing

Reading behavior in terms of underlying thoughts, feelings and intentions.

Peter Fonagy
Anthony Bateman
Fonagy · Bateman

Compassion

Sensitivity to suffering paired with a commitment to relieve it.

Paul Gilbert
Gilbert

Shame

The painful sense of being flawed or unworthy in others’ eyes.

Paul Gilbert
Gilbert

Ambivalence

Wanting and not wanting change at the same time.

William R. Miller
Stephen Rollnick
Miller · Rollnick

Change talk

The person’s own statements in favor of change.

William R. Miller
Stephen Rollnick
Miller · Rollnick

Exceptions

The times the problem is absent or smaller — clues to a solution.

Steve de Shazer
Insoo Kim Berg
Shazer · Berg

Solution-building

Constructing a path to a wanted future, step by small step.

Steve de Shazer
Shazer

Externalizing

Treating the problem as separate from the person, not part of who they are.

Michael White
David Epston
White · Epston

Dominant story

The thin, problem-saturated account that crowds out other truths.

Michael White
White

Differentiation of self

Staying yourself, with your own thinking, inside intense family emotion.

Murray Bowen
Bowen

Family emotional system

The web of reactivity that links a family across generations.

Murray Bowen
Bowen

Boundaries

The invisible lines that define who is part of which family subsystem.

Salvador Minuchin
Minuchin

Reframing

Giving a behavior a new meaning so it can change.

Jay Haley
Haley

Directive

A specific task the therapist assigns to shift a stuck pattern.

Jay Haley
Haley

Parts

The inner sub-personalities that each carry their own feelings and roles.

Richard Schwartz
Schwartz

Self-leadership

Leading from a calm, compassionate core Self.

Richard Schwartz
Schwartz

Spontaneity

A fresh, adequate response to a new situation — the engine of change.

Jacob L. Moreno
Moreno

Role reversal

Stepping into another person’s position to see from their side.

Jacob L. Moreno
Moreno

Ego states

Parent, Adult and Child — the inner voices we speak from.

Eric Berne
Berne

Games

Repetitive, hidden-agenda exchanges that end in familiar bad feelings.

Eric Berne
Berne

Choice

The idea that we choose our behavior to meet basic needs.

William Glasser
Glasser

Basic needs

Survival, love, power, freedom and fun — the drivers of behavior.

William Glasser
Glasser

Creative expression

Letting inner experience take outward, made form.

Margaret Naumburg
Edith Kramer
Naumburg · Kramer

Symbolic speech

Images that say what words cannot yet reach.

Margaret Naumburg
Naumburg

Ultimate concerns

The four givens every life must face: death, freedom, isolation and meaninglessness.

Irvin D. Yalom
Yalom

Existential isolation

The unbridgeable gap between oneself and any other — and the longing for connection it leaves.

Irvin D. Yalom
Yalom

Utilization

Accepting and using whatever the patient brings — behavior, belief, even resistance — as a resource for change.

Milton H. Erickson
Erickson

Indirect suggestion

Artfully vague language that lets a person’s own unconscious fill in the gaps, rather than direct commands.

Milton H. Erickson
Erickson

Therapeutic trance

A focused inner state in which a person can reorganize experience and find new solutions.

Milton H. Erickson
Erickson

Felt Sense

A vague, bodily-felt sense of a whole situation — more than emotion, not yet words — that can shift when you give it gentle attention.

Eugene Gendlin
Gendlin

Focusing

A step-by-step way of turning inward to make contact with the felt sense and let it unfold into insight and relief.

Eugene Gendlin
Gendlin

Experiencing

The flow of inner, felt experience as it happens — how deeply a person can sense and stay with what is going on inside.

Eugene Gendlin
Gendlin

Carrying Forward

The felt shift in which a stuck situation moves a step further on its own once it is sensed freshly — a small but real release.

Eugene Gendlin
Gendlin

Common Factors

The ingredients shared by all effective therapies — a strong relationship, hope, a believable rationale — that may matter more than the specific method.

Marvin Goldfried
Goldfried

Psychotherapy Integration

Drawing on more than one school of therapy, guided by what helps a given person change rather than loyalty to a single approach.

Marvin Goldfried
Goldfried

Coping Skills

Learnable, practical strategies — for thoughts, feelings and situations — that a person can use to handle stress and problems more effectively.

Marvin Goldfried
Goldfried

Consistency

The mind's drive for its many processes and goals to fit together; mental distress grows when they clash and pull in opposite directions.

Klaus Grawe
Grawe

Need Satisfaction

Meeting basic psychological needs — for attachment, control, pleasure and self-esteem; mental health depends on how well these are fulfilled.

Klaus Grawe
Grawe

Incongruence

The gap between what a person needs or intends and what they actually experience; in Grawe's model this gap is what generates symptoms.

Klaus Grawe
Grawe

SASB

Structural Analysis of Social Behavior — a precise map that places any interpersonal or self-directed act along axes of love–hate and freedom–control.

Lorna Smith Benjamin
Benjamin

Interpersonal Copying

The way we re-enact early relationships — treating ourselves and others as our caregivers once treated us, or in reaction against it.

Lorna Smith Benjamin
Benjamin

Gift of Love

Benjamin's idea that even self-defeating symptoms make sense as a hidden loyalty to a loved attachment figure from the past.

Lorna Smith Benjamin
Benjamin

Working Alliance

The collaborative partnership between client and therapist — the quality of their teamwork, which predicts how well therapy goes.

Edward Bordin
Bordin

Bonds, Goals, and Tasks

Bordin's three parts of the alliance: the emotional bond, agreement on what to work toward, and agreement on how to get there.

Edward Bordin
Bordin

Rupture and Repair

The moments when the alliance frays — tension, withdrawal, disagreement — and the work of mending them, which can deepen trust.

Edward Bordin
Bordin

From concept to question

A term is just an idea until you apply it to your own life.

Psipas turns each of these into a question you can actually answer.