Psychology

201 ideas, each explained on one page with a 60-second lesson you can play right there.

Allostatic load Allostatic load is the cumulative physical wear and tear on your body caused by chronic or repeated stress.
Amygdala The amygdala is a pair of almond-sized clusters of neurons located deep inside the temporal lobes of the brain.
Analysis paralysis Overthinking and excessive research freeze choices instead of improving them.
Anchoring effect The anchoring effect is a bias where people rely too heavily on an initial reference number when estimating values or making financial decisions.
Artificial consciousness Artificial consciousness is the idea that a non-biological machine or artificial intelligence could have subjective, inner experiences.
Asch Conformity Experiment Solomon Asch tested group conformity using line lengths, finding that a single dissenting voice can drop conformity by 80 percent.
Attachment in adults Adult attachment theory shows how early caregiver bonds shape trust, emotional distance, and relationship stability in adulthood.
Attachment Styles Attachment styles describe patterns infants use to stay close to caregivers, shaping expectations in future relationships.
Attention Span Attention span is the amount of time someone concentrates on a task before becoming distracted.
Authority bias Authority bias is the tendency to assume an opinion or order is accurate simply because it comes from an authority figure.
Automaticity Automaticity is the ability to carry out actions and mental tasks without thinking about the low-level steps.
Availability heuristic The availability heuristic makes people judge how common or severe an event is by how easily examples come to mind.
Averageness Averageness is the physical beauty that occurs when blending human facial features into a mathematical mean.
Avoidant coping Avoidant coping reduces stress by evading a problem rather than fixing it, bringing immediate relief at the cost of compounding future damage.
Bandwagon effect The bandwagon effect is a cognitive bias where people adopt ideas, styles, or actions simply because others are doing it.
Barnum effect The Barnum effect explains why people believe vague personality profiles apply uniquely to them, powering astrology and cold reading.
Behavioral activation Behavioral activation is a form of psychotherapy that treats depression by scheduling specific, rewarding activities into a person's routine.
Behavioral addiction Behavioral addiction is a compulsion to repeat a rewarding action despite real harm, sharing the same brain adaptations as drug addiction.
Behavioral Economics Behavioral economics combines psychology and economics to study how human cognitive limits and biases distort rational decision-making.
Benjamin Libet Benjamin Libet was an American neuroscientist who studied human consciousness at the University of California, San Francisco.
Beta Endorphins Beta endorphins are peptide molecules, chains of amino acids made in the brain, that act as the body's natural painkillers.
Brainwashing Brainwashing was coined during the Korean War to explain POW confessions, but scientists and courts found the theory has no scientific merit.
Burnout (psychology) Occupational burnout stems from unmanaged workplace stress.
Bystander Effect The bystander effect occurs when the presence of other people discourages an individual from intervening in an emergency.
Catchiness Catchiness is a measure of how easily a tune, phrase, or advertising slogan is remembered and how hard it is to forget.
Chronotype A chronotype is a person's natural biological tendency to sleep and be active at specific times during a 24-hour day.
Circadian Rhythm Circadian rhythms are roughly 24-hour internal biological cycles.
Clickbait Clickbait uses sensational headlines and hidden information to manipulate users into clicking links that overpromise and underdeliver.
Cocktail party effect The cocktail party effect is your brain's ability to focus on a single speaker while filtering out competing background noise.
Codependency Codependency is a relational pattern where one person enables another's self-destructive behavior through high self-sacrifice and control.
Cognitive Behavioral Therapy (CBT) Cognitive behavioral therapy treats automatic negative thoughts as unverified hypotheses, combining cognitive reframing with new behavioral habits.
Cognitive behavioral therapy for insomnia Cognitive behavioral therapy for insomnia is the first-line treatment for chronic insomnia, relying on sleep restriction and stimulus control.
Cognitive Bias A cognitive bias is a predictable, systematic pattern where human judgment veers away from objective logic or probability.
Cognitive Dissonance Cognitive dissonance is the mental discomfort you feel when you hold conflicting beliefs, or when your actions clash with your values.
Cognitive Distortions A cognitive distortion is an exaggerated or irrational thought pattern that causes you to perceive reality inaccurately.
Cognitive reframing Cognitive reframing is a technique where you identify and change the way you view situations, thoughts, or emotions.
Cold reading Cold reading uses high-probability guesses and subtle body language cues to make strangers reveal their own details while believing the reader knew them.
Compatibilism Compatibilism is the belief that free will and determinism can exist together without contradiction.
Confirmation Bias Confirmation bias leads people to seek, interpret, and remember evidence that fits their prior beliefs while ignoring contrary facts.
Conformity Conformity is the act of changing your beliefs, attitudes, or behaviors to match the norms of a group.
Conspicuous consumption Conspicuous consumption is buying expensive goods or services beyond practical need to publicly display wealth, income, and social status.
Critical period A critical period is a developmental window where the nervous system requires specific environmental input to wire essential functions.
Cue-dependent forgetting Cue-dependent forgetting is failing to recall something that's still stored because the right cue is missing.
DARVO DARVO stands for Deny, Attack, and Reverse Victim and Offender.
Default Mode Network The default mode network is a coordinated set of brain regions that fires up when you are not focused on the outside world.
Defence mechanism Defence mechanisms are unconscious psychological tactics that protect the mind from anxiety and maintain emotional homeostasis.
Dementia Dementia is an umbrella term for a progressive decline in mental abilities caused by physical damage to the brain, which interferes with daily life.
Determinism Determinism is the philosophical view that every event is the inevitable result of preceding events and the laws of nature.
Distraction Distraction is the process of pulling attention away from a chosen focus, which blocks or reduces the intake of relevant information.
Doomscrolling Doomscrolling is the habit of continuously consuming distressing digital content.
Dream interpretation Dream interpretation is the process of assigning meaning to the images and stories experienced during sleep.
Dreams A dream is a series of images, events, and emotions that your mind generates involuntarily while you sleep.
Dunbar's Number Dunbar's number is the cognitive limit of roughly 150 stable relationships a human can maintain, predicted by neocortex size.
Dunning-Kruger Effect The Dunning-Kruger effect is a cognitive bias where people with low ability in a specific area overestimate their competence.
Earworm An earworm is a catchy piece of music or a phrase that continuously loops in your mind without your deliberate choice.
Echo chamber (media) An echo chamber is a closed media system where repeated beliefs amplify preexisting views and insulate people from opposing facts.
Encoding specificity principle Information is easiest to retrieve when the physical, auditory, or mental state at recall matches the conditions present during learning.
Escalation of commitment Why people double down on failing projects to protect their own past choices, violating standard cost-benefit reasoning.
Eudaimonia Eudaimonia is an ancient Greek term for the highest human good, commonly understood as human flourishing or living well.
Executive Function Executive function is the brain network that overrides automatic impulses to plan, remember information, and hit long-term goals.
Exposure therapy Exposure therapy treats anxiety by confronting fear triggers without escaping, helping the brain learn that the feared outcome will not occur.
Extinction (psychology) Extinction stops a learned behavior by withholding reinforcement or cues, creating a new memory rather than erasing the old one.
Eyewitness identification Eyewitness identification is a powerful courtroom tool, but misidentifications account for over 75% of convictions overturned by DNA.
Facial Symmetry Facial symmetry is the structural balance between the left and right sides of a person's face.
False confession A false confession is an admission of guilt for a crime that the person did not actually commit.
Fatalism Fatalism is the view that fate fixes every event, so no choice can change it.
Fear of negative evaluation Fear of negative evaluation is the dread of being judged badly.
Fight-or-flight response Fight-or-flight is the body's automatic reaction to threat: the amygdala alerts the hypothalamus, adrenaline floods in, and digestion shuts down.
Filter Bubble How algorithms use browsing history, location, and clicks to create personalized web bubbles that isolate users from opposing viewpoints.
Flow (psychology) Flow is a mental state where you become completely absorbed in an activity, losing track of time and outside distractions.
FOMO (Fear Of Missing Out) FOMO is the anxiety that others are having rewarding experiences without you, intensified by social feeds into constant psychological distress.
Foot-in-the-door technique The foot-in-the-door technique wins a big yes by asking a small favor first.
Forgetting curve The forgetting curve shows that memory loss is steepest right after learning.
Framing Effect The framing effect makes people pick different options based on whether identical outcomes are presented as gains or losses.
Freudian Unconscious The Freudian unconscious is the part of the mind holding hidden thoughts, drives, and memories that a person cannot inspect directly.
Friendship Friendship is a relationship of mutual affection between people that is stronger than an acquaintance or casual association.
Frisson Frisson is a brief physical reaction to rewarding stimuli like music or art that creates skin tingling, goosebumps, and pleasure.
Fundamental attribution error The fundamental attribution error makes us blame people's character for their actions while ignoring their circumstances.
Gambling Gambling is the wagering of money or something else of value on a random event with the intention of winning a prize.
Gaslighting Gaslighting is the psychological manipulation of a person into questioning their own perception of reality.
Goal setting Specific, hard targets systematically outperform easy goals and do-your-best advice by focusing attention, effort, and persistence.
Groupthink Groupthink is a psychological pattern where members of a tight-knit group prioritize getting along over critically testing ideas.
Habit A habit is a routine behavior that is repeated regularly and occurs with little to no conscious thought.
Habit reversal training Habit reversal training treats tics, hair pulling, and nail biting by teaching a physical action that blocks the repetitive urge.
Harry Harlow Harry Harlow was an American psychologist who studied maternal separation, dependency, and social isolation in rhesus monkeys.
Hedonic treadmill Learn what the hedonic treadmill is, how psychological adaptation restores our happiness set point, and why big life events rarely change our mood forever.
Hedonism Hedonism is a family of philosophical ideas built on the claim that pleasure is the primary good and pain is the primary bad.
Hindsight bias Hindsight bias makes past events seem predictable after they happen, distorting memories and creating false confidence about future forecasts.
Hippocampus The hippocampus is a curved structure tucked inside each side of the brain that turns new experiences into long-term memories.
Hofstadter's law Hofstadter's law is the rule that complex work always takes longer than expected, even when you factor in the law itself.
Human echolocation Human echolocation is the ability to detect and map objects by producing sounds and listening to the returning echoes.
Hyperpalatable food Hyperpalatable foods combine specific ratios of fat, sugar, salt, and carbs to overstimulate brain reward circuits and bypass fullness cues.
Id, ego and superego The id, ego, and superego are three interacting parts of the mind that Sigmund Freud proposed to explain internal conflict.
Ikigai Ikigai is a Japanese concept that refers to a person's reason for living or what makes life feel worth it.
Illusory truth effect The illusory truth effect is the cognitive tendency to believe false information is true after hearing it repeated multiple times.
Implementation intention An implementation intention is a self-regulation strategy that uses an if-then sentence to link a specific future cue to an exact behavior.
Impostor syndrome Impostor syndrome is the belief that your skills, accomplishments, and success are fraudulent, despite clear evidence that you are competent.
Imprinting (psychology) Imprinting is a rapid learning process during a brief early window that permanently shapes an animal's social and mating preferences.
In-group and out-group An in-group is any social circle, team, or category you feel you belong to, while an out-group is everyone else.
Inattentional blindness Inattentional blindness causes people to miss visible objects in plain sight when their attention is fully occupied by another task.
Insomnia Insomnia is a sleep disorder where a person struggles to fall asleep or stay asleep for as long as needed.
Interpersonal ties Interpersonal ties are the information-carrying connections between individual people in a social network.
Involuntary memory Involuntary memory is a type of memory that occurs when everyday sensory cues trigger past recollections without conscious effort.
Laziness Laziness is the emotional reluctance to act or exert effort even when you have the physical or mental capacity to do so.
Learned helplessness Learned helplessness is giving up after stress you couldn't control.
Learned optimism Learned optimism is the skill of consciously challenging negative self-talk when dealing with setbacks.
Levels-of-processing effect The levels-of-processing effect is the finding that how well you remember something depends on how deeply you analyze it during encoding.
Lifestyle creep Lifestyle creep occurs when higher income leads to higher spending at the same rate, turning optional luxuries into perceived daily necessities.
Limerence Limerence is an overwhelming mental state of obsessive infatuation with someone when you do not know if they return your feelings.
Locus of control Locus of control is how much you think your own actions, rather than luck or other people, decide what happens to you.
Loneliness Loneliness is an unpleasant emotional reaction to perceived or actual social isolation.
Long-term potentiation Long-term potentiation is a long-lasting increase in signal strength between two neurons after they fire together repeatedly.
Loss Aversion Loss aversion is a cognitive bias where losing something hurts more than gaining the exact same thing feels good.
Love Bombing Love bombing is the act of overwhelming someone with intense affection, flattery, and attention to influence them.
LSD LSD is a powerful semisynthetic psychedelic drug derived from ergot, a fungus that grows on rye.
Marshmallow Test The Marshmallow Test is a classic psychology experiment where children choose between one immediate treat or two if they wait alone for 15 minutes.
Martyr complex A martyr complex is a behavioral pattern where a person actively seeks out or holds onto suffering instead of solving it.
Matthew effect The Matthew effect explains how initial advantages in wealth, fame, or credit snowball over time, concentrating future gains among top performers.
Memory Consolidation Memory consolidation is the brain process that stabilizes newly learned information so it can be stored as a long-term memory.
Mental accounting Mental accounting explains how people separate identical money into subjective buckets, changing how they spend and evaluate financial decisions.
Mentalist A mentalist is a theatrical performer who appears to read minds, predict the future, or demonstrate psychic abilities.
Mere-exposure effect Repeated exposure makes people prefer words, faces, shapes, and sounds, even without conscious awareness or rational reasons.
Mihaly Csikszentmihalyi Hungarian-American psychologist Mihaly Csikszentmihalyi identified flow, the state of deep absorption where challenge matches high skill.
Milgram Experiment Stanley Milgram tested obedience to authority, finding 65% of participants willing to administer what they believed were fatal electric shocks.
Mind Wandering Mind wandering happens when thoughts drift away from immediate tasks.
Misdirection (magic) Misdirection is the art of controlling audience attention to hide secret moves and create the illusion of magic.
MKUltra MKUltra was a covert, illegal human experimentation program run by the CIA from 1953 to 1972 to test mind control and truth serums.
Monty Hall Problem Switching doors in the Monty Hall problem raises your chance of winning from 1/3 to 2/3 because the host filters out a losing door.
Moravec's Paradox Moravec's paradox, set out by Hans Moravec in 1988: computers handle chess and calculus with ease but struggle with what a toddler does without thinking, like walking or recognizing a face.
Motivation Motivation is an internal state that drives people and animals to start, continue, or stop a specific behavior.
Narcissism Narcissism is a self-centered personality style marked by an excessive preoccupation with oneself and one's own needs, often at the expense of others.
Narcissistic personality disorder Narcissistic personality disorder is a psychiatric condition defined by grandiosity, low empathy, and impaired relationships across 256 trait combinations.
Neuroscience Neuroscience is the scientific study of the nervous system, including the brain, spinal cord, and peripheral nerves.
Nostalgia Nostalgia is a bittersweet emotional longing for past events, people, or places that cannot be recovered.
Obedience Obedience is a form of social influence where a person follows direct orders from an authority figure.
Oedipus complex Sigmund Freud defined the Oedipus complex as childhood desire for one parent and rivalry with the other, shaping adult conscience and neurosis.
Online dating Online dating uses digital profiles to connect romantic partners, revealing stark patterns in how age, race, and education affect attraction.
Operant Conditioning Operant conditioning is a learning process where voluntary actions change based on the rewards or punishments that follow them.
Overconfidence Bias Overconfidence bias is a mental blind spot where a person's certainty in their own judgment reliably exceeds its actual accuracy.
Oxytocin Oxytocin is a peptide hormone, a small chemical messenger made of amino acids, produced in the brain's hypothalamus.
Paradox of hedonism The paradox of hedonism is the observation that deliberately chasing pleasure often prevents you from experiencing it.
Parkinson's law Parkinson's law states that work expands so as to fill the time available for its completion.
Perfectionism (psychology) Perfectionism is a personality trait defined by striving for flawlessness, critical self-evaluations, and tying self-worth to productivity.
Physical attractiveness Physical attractiveness is the degree to which a person's bodily and facial features are seen as aesthetically pleasing or desirable.
Planning fallacy The planning fallacy causes people to underestimate the time, costs, and risks of their own future tasks while overestimating the benefits.
Platonic Relationship A platonic relationship is an affectionate, non-sexual bond originally conceived by Plato as an ascent toward absolute beauty.
Pomodoro Technique The Pomodoro Technique is a time-management method that splits work into focused 25-minute intervals separated by mandatory short breaks.
Positive psychology Positive psychology is the scientific study of the conditions and processes that lead to human flourishing, positive relationships, and well-being.
Practice (learning method) Practice is the act of rehearsing a behavior repeatedly to help learn, maintain, or master a skill.
Problematic smartphone use Problematic smartphone use describes compulsive phone habits and distress without requiring a formal addiction diagnosis.
Procrastination Procrastination is needless delay to dodge a task's bad feelings; the relief keeps it going.
Prospect theory Prospect theory is an economic theory describing how real people make decisions involving risk and uncertainty.
Proximity principle The proximity principle explains why people form relationships with those physically nearby due to familiarity and repeated passive contact.
Psychedelic therapy Psychedelic therapy is the use of psychedelic substances under professional supervision to treat mental health disorders.
Psychoanalysis Psychoanalysis is Freud's theory of mind and talk therapy for uncovering unconscious drives.
Psychological Manipulation Psychological manipulation is underhanded influence used for personal gain at another person's expense, exploiting vulnerabilities and biases.
Psychological stress Psychological stress is a reaction to perceived demands.
Psychology Psychology is the scientific study of the mind and behavior in both humans and nonhumans.
Psychosexual development Sigmund Freud proposed that adult personality stems from how children resolve bodily conflicts across five distinct psychosexual stages.
Psychotherapy Psychotherapy uses psychological methods to improve mental health.
Radicalization Radicalization is the gradual shift from mainstream views to extreme beliefs, acting as a social trap that can lead to violent action.
Reciprocity (social psychology) Reciprocity is the social norm of returning favors and harms in kind.
Reinforcement Reinforcement is any consequence that increases the future rate of a behavior.
REM Sleep REM sleep is a distinct phase of sleep where the brain acts nearly awake while the body's skeletal muscles are paralyzed.
Reminiscence bump The reminiscence bump is why adults over forty remember more from ages 10 to 30 than from any other time of life.
Scarcity (social psychology) Scarcity causes people to place higher value on limited items, driving panic buying, impulse purchases, and biased decisions.
Self-Control Self-control is the ability to regulate your thoughts, emotions, and behavior when facing immediate temptations and impulses.
Self-criticism Self-criticism is a personality trait where a person evaluates themselves negatively and blames their own character for failures.
Self-disclosure Self-disclosure is the communication process where one person shares private information about themselves with another person.
Self-efficacy Self-efficacy is an individual's belief in their ability to act in the ways necessary to achieve a specific goal.
Self-serving bias Why we attribute our successes to personal skill and blame our failures on outside factors to protect our self-esteem.
Self-Worth Self-worth is an evaluation of your own value, abilities, and moral qualities, reflecting how you feel about who you are.
Serotonin Serotonin is a chemical messenger that nerve cells use to communicate with each other and with the rest of the body.
Sexual repression Sexual repression occurs when internal shame, religious dogmas, or legal mandates prevent people from expressing their sexuality.
Sigmund Freud Sigmund Freud founded psychoanalysis, explaining how unconscious desires, dreams, and slips of the tongue shape human behavior.
Sleep Sleep is a reversible state of reduced consciousness and physical activity where the body rests and sensory responses drop.
Sleep debt Sleep debt is the cumulative effect of not getting enough sleep over days or weeks.
Sleep Deprivation Sleep deprivation is the condition of not getting enough sleep duration or quality to keep your body and mind working properly.
Slot machine A slot machine picks its result with a random number generator the instant you press spin.
Slow-Wave Sleep Slow-wave sleep is the deepest stage of non-REM sleep, defined by large delta waves that help the brain consolidate declarative memories.
Social engineering (security) Social engineering tricks people into handing over private data or access by exploiting human psychology rather than software bugs.
Social Norms A social norm is a shared standard of acceptable behavior within a group.
Social proof Social proof occurs when people copy others to determine correct behavior during uncertain situations, often leading to genuine belief.
Social Psychology Learn what social psychology is, how it uses experiments to study group influence and attitudes, and how it differs from sociology.
Spaced repetition Spaced repetition is a learning method where you review information at increasing intervals of time instead of all at once.
Spotlight effect The spotlight effect causes people to overestimate how much others notice their appearance, mistakes, and nervous feelings.
Stimulus control Stimulus control occurs when a behavior happens in the presence of a specific cue and does not happen in its absence.
Stoicism Stoicism is an ancient Greek and Roman philosophy that treats virtue and rational judgment as the highest goods in human life.
Strange situation How Mary Ainsworth's 21-minute laboratory test uses separations and reunions to measure the attachment relationship between babies and caregivers.
Stress Hormone A stress hormone is a chemical signal released by endocrine glands to adjust your body during times of threat.
Stress Management Stress management uses psychological techniques and physical interventions to reduce chronic stress and prevent health decline.
Subjective well-being Subjective well-being measures personal evaluations of life through emotional moods, life satisfaction, and meaning rather than external wealth.
Survivorship Bias Survivorship bias occurs when we evaluate only surviving entities and overlook failures, leading to false conclusions and inflated success rates.
Synaptic pruning Synaptic pruning is the biological process of eliminating or weakening unused connections between brain cells.
Testing effect The testing effect is the memory boost from recalling information instead of rereading it.
Time Management Time management is the practice of consciously planning and controlling how much time you spend on specific activities.
Tinder (app) Tinder is a geosocial dating and networking app where people browse nearby profiles by swiping right to like or left to pass.
Transference Transference happens when a person unconsciously redirects feelings, expectations, or desires from past relationships onto someone in the present.
Traumatic bonding Traumatic bonding is a psychological attachment that an abused person develops toward their abuser, not toward other victims.
Working Memory Working memory is the cognitive system that holds and manipulates information temporarily so you can reason and make decisions.
Work–life balance Work–life balance is the equilibrium between a person's job and their personal life, including family, leisure, and health.