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The peak-end rule means people judge experiences primarily by how they felt at the peak and at the end.
Children as young as 3 show a preference for fairness, suggesting moral intuitions are partly innate.
Terror management theory suggests much of human behavior is unconsciously driven by fear of mortality.
People walking in opposite directions in crowds spontaneously form lanes without conscious coordination.
Sleep consolidates memories — learning before sleep produces better retention than learning before wakefulness.
Research shows gratitude journaling measurably improves wellbeing over time.
The planning fallacy causes people to underestimate how long tasks will take — even when they know about the bias.
Overconfidence bias is the most robust finding in the psychology of judgment — people routinely overestimate their accuracy.
Humans have a negativity bias — negative events have a stronger psychological impact than equally positive ones.
The Pygmalion effect demonstrates that higher expectations from authority figures produce higher performance.
Color psychology shows red increases heart rate and appetite, while blue promotes calm and focus.
Social proof — the tendency to copy others — is one of the most powerful drivers of human behavior.
The cocktail party effect allows people to focus on one conversation in a noisy room while ignoring others.
Learned helplessness occurs when repeated failures cause a person to stop trying, even when success is possible.
Humans are uniquely capable of mental time travel — imagining both the past and future in vivid detail.
The availability heuristic causes people to judge probability based on how easily examples come to mind.
Studies show that people consistently overestimate how long negative emotions will last after bad events.
Intrinsic motivation — doing something for its own sake — produces better long-term performance than extrinsic rewards.
The sunk cost fallacy causes people to continue bad investments because of what they've already spent.
Phobias can be transmitted culturally — children model fear responses from observing caregivers.
People in positive moods make more creative decisions; negative moods favor analytical thinking.
Research suggests willpower is a limited resource — making many decisions depletes it over the course of a day.
The halo effect causes a positive impression in one area to influence judgments across unrelated areas.
Loneliness activates the same brain regions as physical pain — social exclusion is neurologically similar to injury.
Humans are hardwired for storytelling — the brain processes narrative information differently from raw facts.
Flow state, described by psychologist Mihaly Csikszentmihalyi, is a mental state of complete absorption in a challenging activity.
The mere exposure effect means people develop preferences for things simply because they are familiar with them.
Priming — exposure to one stimulus — unconsciously influences responses to later stimuli.
The spotlight effect makes people think others notice their mistakes far more than they actually do.
People who read fiction show higher empathy and social cognitive skills than those who don't.
Nostalgia has measurable psychological benefits — it increases feelings of social connectedness and meaning.
The phonological loop in working memory lets you hold about 7 items (plus or minus 2) in short-term storage.
Mirror neurons may explain why watching someone else get injured causes a physical sensation of discomfort.
The anchoring bias causes people to rely too heavily on the first piece of information they encounter.
Humans tend to remember incomplete tasks better than completed ones — this is called the Zeigarnik effect.
Sleep deprivation after 24 hours produces cognitive impairment equivalent to a blood alcohol level of 0.10%.
The bystander effect means people are less likely to help in an emergency when others are present.
Cognitive dissonance — the discomfort of holding contradictory beliefs — drives people to rationalize rather than change behavior.
The average person makes about 35,000 decisions per day, most of them unconsciously.
Humans are the only animals known to blush — Darwin called it 'the most peculiar and most human of all expressions.'
The Dunning-Kruger effect describes how people with limited knowledge overestimate their competence, while experts often underestimate theirs.
Pelé scored over 1,000 career goals, though many came in unofficial matches — his official FIFA-recognized total is 757.
The first woman to complete the Boston Marathon officially was Kathrine Switzer in 1967, despite officials trying to pull her off the course.
Extreme sports athlete Travis Pastrana became the first person to land a double backflip on a motorcycle at X Games 2006.
Competitive sailing at the Olympic level involves reading wind shifts, currents, and opponents' tactics simultaneously.
The maximum legal weight for a cricket ball is 163 grams — close to a baseball but harder.
Dressage — precision horse riding — scores horses and riders on over 30 individual movements in a freestyle routine.
The world record for the 100m dash has dropped from 10.6 seconds in 1912 to 9.58 seconds today.
High jumpers use the Fosbury Flop — jumping backwards over the bar — introduced by Dick Fosbury at the 1968 Olympics.
NASCAR pit crews can change four tires and refuel in under 13 seconds.