February 2025
- Feb 8, 2025ConceptsReactance Theory: Understanding Desires for FreedomReactance Theory explains why forbidden things become more desirable and why heavy-handed persuasion backfires.
- Feb 5, 2025ConceptsGoal-Setting Theory: Effective Strategies for SuccessSpecific, hard goals beat vague effort every time, but they also built Enron and the Ford Pinto.
- Feb 1, 2025ConceptsCognitive Consistency Theory: The Need for Belief AlignmentCognitive Consistency Theory explains why people change beliefs to reduce psychological discomfort.
January 2025
- Jan 24, 2025ConceptsThe Implicit Association Test: Measuring Hidden BiasAnthony Greenwald, Debbie McGhee, and Jordan Schwartz's 1998 paper introduced a test that could measure racial bias in milliseconds.
- Jan 21, 2025ConceptsAttachment Theory and Its Impact on RelationshipsIn 1957, Harry Harlow placed infant rhesus monkeys with two wire surrogates: one that provided milk, one wrapped in terrycloth that provided...
- Jan 18, 2025ConceptsUnderstanding Self-Determination Theory and MotivationIn 1971, Edward Deci paid students to solve Soma puzzles they previously enjoyed, and found they spent less time on the puzzles during free time...
- Jan 15, 2025ConceptsMoral Foundations Theory: Why Liberals and Conservatives DifferJonathan Haidt asked subjects to evaluate a scenario: a family eats their dog after it dies in a car accident. No one is harmed. Everyone consents.
- Jan 12, 2025ConceptsDeindividuation: The Impact of Anonymity on BehaviorIn 1969, Philip Zimbardo had NYU students administer electric shocks to another person. Half wore their normal clothes and name tags.
- Jan 11, 2025ConceptsConstrual Level Theory: The Effects of DistanceNira Liberman and Yaacov Trope asked students to describe activities, taking a trip, eating breakfast, reading, either for tomorrow or for next...
- Jan 9, 2025ConceptsObedience to Authority: The Dangers of ComplianceStanley Milgram asked psychiatrists to predict how many Yale subjects would administer the maximum 450-volt shock to another person if ordered to...
- Jan 8, 2025ConceptsMental Accounting: Why a Dollar Is Not Always a DollarYou have two $100 bills in your wallet: one earmarked for rent, one for entertainment. You spend the entertainment $100 on dinner.
- Jan 7, 2025ConceptsLearned Helplessness: Why People Stop Trying to EscapeMartin Seligman and Steven Maier gave dogs inescapable electric shocks in 1967. When later placed in a box where escape was easy, the dogs did not...
- Jan 6, 2025ConceptsInattentional Blindness: Missing What We Don't NoticeIn 1999, Daniel Simons and Christopher Chabris asked subjects to count basketball passes in a video.
- Jan 4, 2025ConceptsImplicit Bias: Exploring Unconscious PrejudicesIn 1998, Anthony Greenwald, Debbie McGhee, and Jordan Schwartz published the Implicit Association Test, a measure of automatic mental associations...
- Jan 3, 2025ConceptsElaboration Likelihood Model: How Persuasion Actually WorksIn 1984, Richard Petty and John Cacioppo told some students that a proposed exam policy would take effect at their university next year (high...
- Jan 2, 2025ConceptsCognitive Dissonance Reduction StrategiesA smoker who knows smoking causes cancer has a problem: the belief 'I smoke' conflicts with the belief 'smoking kills.' The discomfort of that...
- Jan 1, 2025ConceptsAnchoring and Adjustment: Influence of Initial NumbersTversky and Kahneman spun a rigged wheel that landed on either 10 or 65, then asked subjects how many African countries are in the United Nations.
December 2024
- Dec 31, 2024ConceptsThe Affect Heuristic: How Feelings Become Facts About RiskPaul Slovic found that people who feel positively about nuclear power judge its risks as low and its benefits as high.
- Dec 30, 2024ConceptsUnderstanding Social Comparison Theory and Its EffectsOlympic silver medalists look less happy than bronze medalists at the moment of winning. The silver medalist compares upward, to gold, which they...
- Dec 29, 2024ConceptsPsychological Reactance: Why Bans BackfireIn 1975, Stephen Worchel put two cookies in one jar and ten in another, then told subjects the scarce jar was limited due to demand.
- Dec 27, 2024ConceptsThe IKEA Effect: Why We Overvalue What We Build OurselvesNorton, Mochon, and Ariely asked subjects to assemble IKEA boxes, then bid on them in an auction alongside identical expert-assembled boxes.
- Dec 26, 2024ConceptsEgo Depletion: Is Willpower a Limited Resource?The radish-and-cookies study launched a willpower theory that now faces a replication crisis.
- Dec 22, 2024ConceptsChoice Architecture: Designing Decisions for ImpactWhen Brian Wansink rearranged a school cafeteria (putting fruit at eye level and making desserts harder to reach), fruit consumption increased by...
- Dec 21, 2024ConceptsAttribution Theory: Misunderstanding ActionsIn 1967, Jones and Harris had subjects read essays supporting Fidel Castro's Cuba. Even when subjects were explicitly told the writers had been...
- Dec 19, 2024ConceptsThe Pygmalion Effect in Psychology: Expectations and Their ImpactIn 1968, Robert Rosenthal and Lenore Jacobson told teachers at a San Francisco elementary school that certain students, randomly selected, had...
- Dec 17, 2024ConceptsThe Mere Exposure Effect: Why Familiarity Breeds LikingIn 1968, Robert Zajonc exposed subjects to nonsense words, Chinese characters, and photographs of faces at varying frequencies.
- Dec 16, 2024ConceptsThe Just-World Hypothesis: Understanding Victim BlameIn the mid-1960s, Melvin Lerner showed subjects an innocent woman receiving electric shocks. Unable to stop the shocks, observers began to derogate her,...
- Dec 15, 2024ConceptsThe False Consensus Effect: Misjudging Social NormsIn 1977, Lee Ross asked Stanford students whether they would walk around campus wearing a sandwich board reading 'Eat at Joe's.' Those who agreed...
- Dec 13, 2024ConceptsThe Zeigarnik Effect: Why Unfinished Tasks Haunt the MindIn a Vienna café in the 1920s, Kurt Lewin noticed that waiters remembered unpaid tabs in perfect detail but forgot settled ones immediately.
- Dec 12, 2024ConceptsLocus of Control: Rotter's Framework on Who Controls Your LifeLocus of Control measures whether people believe outcomes are controlled by their own actions (internal) or by external forces like fate, luck, or...
- Dec 11, 2024ConceptsThe Self-Serving Bias: Taking Credit, Avoiding BlameIn 1964, Johnson, Feigenbaum, and Weiby gave teachers feedback on a student's performance. When the student improved, teachers attributed it to...
- Dec 10, 2024ConceptsThe Placebo Effect: How Expectation Becomes PhysiologyIn 1955, Henry Beecher analyzed 15 clinical trials and found that 35.2% of patients responded to inert treatments.
- Dec 9, 2024ConceptsMoral Licensing: How Good Deeds Allow Bad BehaviorIn 2001, Benoît Monin and Dale Miller at Stanford showed that subjects who had the opportunity to establish moral credentials, by disagreeing...
- Dec 5, 2024ConceptsIllusory Correlation: Patterns that Mislead Our MindsIn 1967, Loren Chapman showed clinical psychologists Draw-a-Person test responses and patient diagnoses.
- Dec 4, 2024ConceptsHindsight Bias ExplainedHindsight bias is the tendency to believe after an event that you predicted it all along. Learn the psychology, research, and real-world consequences.
- Dec 3, 2024ConceptsThe Representativeness Heuristic: Judging by AppearancesLinda is 31, outspoken, a philosophy major, passionate about social justice. Is she more likely to be a bank teller, or a bank teller active in the...
- Dec 2, 2024ConceptsThe Negativity Bias: Why Bad Is Stronger Than GoodJohn Gottman's lab found that marriages headed for divorce had a ratio of positive to negative interactions of about 0.8:1.
November 2024
- Nov 30, 2024ConceptsIntermittent Reinforcement: Unpredictable Rewards ExplainedIntermittent reinforcement explains why slot machines, social media likes, and even toxic relationships can be impossible to quit.
- Nov 26, 2024ConceptsIn-Group Bias: The Psychology of Group FavoritismIn 1971, Henri Tajfel assigned Bristol schoolboys to groups based on a coin flip. Within minutes, they were systematically favoring their own...
- Nov 20, 2024ConceptsThe Halo EffectIn 1920, Edward Thorndike noticed that military officers who rated their soldiers as intelligent also rated them as physically fit, loyal, and dependable, and vice versa. The ratings correlated far more strongly than the actual traits could possibly justify. Thorndike had identified the halo effect: a single positive impression radiates outward and distorts every subsequent judgment. A century later, research shows the halo follows us into hiring, justice, medicine, and every relationship we form.
- Nov 16, 2024ConceptsThe Fundamental Attribution ErrorIn 1967, Edward Jones and Victor Harris asked students to rate the true attitudes of essayists who had written pro-Castro arguments. When told the writer chose the position freely, students inferred pro-Castro attitudes. When told the writer was assigned the position (forced to argue a side they might not believe), students still inferred pro-Castro attitudes. The situational constraint made no difference. The fundamental attribution error: we systematically underestimate the power of situations and overestimate the role of character when explaining other people's behavior.
- Nov 14, 2024ConceptsConfirmation Bias: Why We Find What We're Looking ForIn 1960, Peter Wason showed subjects the sequence 2-4-6 and told them it followed a rule. To discover the rule, they proposed triples. Almost universally, subjects proposed triples that fit their hypothesis, such as 4-6-8, 10-12-14, and almost never proposed triples that could disprove it. The rule was simply 'any ascending sequence.' Confirmation bias: the systematic tendency to search for, favor, and remember information that confirms what we already believe.
- Nov 10, 2024ConceptsThe Availability Heuristic and Media: Why What Comes to Mind Feels Like What Is TrueTversky and Kahneman asked subjects whether more English words begin with the letter K or have K as their third letter. Most said K-first, wrong by a factor of three. Words starting with K are just easier to retrieve. The availability heuristic: we judge probability and frequency by how easily examples come to mind, not by how common they actually are. The science behind risk misperception, media effects, and why we fear the wrong things.
October 2024
February 2024
January 2024
- Jan 13, 2024ConceptsSelf-Efficacy: The Power of Belief in CapabilitiesSelf-efficacy (the belief in one's capacity to execute behaviors required to produce outcomes) is one of psychology's most validated predictors...
- Jan 12, 2024ConceptsThe Scarcity Principle: The Allure of Limited ResourcesThe Scarcity Principle explains why limited availability makes things more desirable, and why this effect is so reliably exploited in marketing,...
- Jan 10, 2024ConceptsNeed for Cognition: Understanding Thought PreferencesNeed for Cognition measures the tendency to engage in and enjoy effortful thinking. Explore Cacioppo and Petty's foundational research, the...
October 2023
January 2023
- Jan 9, 2023ConceptsWhat Is the Placebo Effect and How Strong Is ItThe placebo effect is measurable, replicable, and sometimes clinically significant. Learn how it works, what research shows, and when it matters most.
- Jan 3, 2023ConceptsWhat Is Behavioral Science and Its ImpactBehavioral science studies why people act as they do, revealing the gap between rational models and real decisions.
December 2022
November 2022
August 2022
February 2022
- Feb 26, 2022ConceptsCognitive Dissonance: When Beliefs ClashCognitive dissonance is the discomfort we feel when beliefs and actions conflict. Learn Festinger's theory, the doomsday cult study, and how we...
- Feb 19, 2022ConceptsThe Bystander Effect: Witnesses and Help RefusalOn March 13, 1964, Kitty Genovese was stabbed to death outside her Queens apartment. The New York Times reported that 38 neighbors watched and did...
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