The Tetris Effect refers to a real cognitive phenomenon
Video Games
Playing intense pattern games like Tetris for long sessions can cause people to see falling blocks when they close their eyes.
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Weird Facts
The placebo effect can trigger real body responses
Psychology
Belief and expectation can measurably influence symptoms, pain, and physiology.
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Weird Facts
Circadian rhythms keep body time
Psychology
Internal clocks help regulate sleep, temperature, hormones, and alertness across the day.
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Weird Facts
False memories can feel vivid
Psychology
Human memory reconstructs events, which means convincing memories can include details that never happened.
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Weird Facts
The peak-end rule shapes remembered experiences
Psychology
People often judge an experience by its most intense point and its ending, not the full average.
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Weird Facts
Dunbar's number suggests ~150 stable relationships
Psychology
Anthropologist Robin Dunbar proposed that the size of the human neocortex limits the number of meaningful social relationships we can maintain to around 150.
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Frequency illusion makes new things seem everywhere
Psychology
After noticing something, people often spot it repeatedly because attention has been tuned to it.
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The doorway effect can wipe an intention
Psychology
Walking into a new room can make people forget what they meant to do.
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Phantom vibration syndrome feels like a false phone buzz
Psychology
Many people occasionally sense a phone vibration even when no alert happened.
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Memory is reconstruction, not playback
Psychology
Remembering is an active rebuild using fragments, context, and expectations.
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The rubber hand illusion can borrow ownership
Psychology
With matching touches, people can feel as if a fake rubber hand is part of their body.
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Just seeing something repeatedly makes you like it more
Psychology
The mere-exposure effect: simple repeated exposure to a stimulus — a face, a melody, a logo — measurably increases preference for it, even without conscious awareness.
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The endowment effect makes ownership sticky
Psychology
People tend to value an object more once they own it.
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Yawning can be contagious
Psychology
Seeing or hearing a yawn can trigger yawning in another person, especially in social settings.
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The Zeigarnik effect keeps unfinished tasks noisy
Psychology
Unfinished goals can stay mentally active and pop back into attention.
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Earworms are sticky loops of music
Psychology
Short, catchy musical fragments can repeat in the mind without deliberate effort.
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The IKEA effect makes effort feel valuable
Psychology
People often value things more when they helped build or assemble them.
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Loss aversion makes losses feel heavier than gains
Psychology
For many decisions, losing something hurts more than gaining the same thing pleases.
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Sleep paralysis can create a sensed presence
Psychology
During sleep paralysis, dream-like perception and temporary muscle atonia can make a room feel occupied.
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Inattentional blindness can hide a visible object
Psychology
When attention is locked on a task, people may fail to notice something right in front of them.
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Laughter is a social signal as much as a joke response
Psychology
People laugh far more in social interaction than when they are alone with funny material.
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Change blindness hides obvious edits
Psychology
People can miss major visual changes when attention is interrupted or focused elsewhere.
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The cocktail party effect filters chaos
Psychology
People can focus on one voice in noise and still notice personally meaningful words like their name.
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The nocebo effect is the placebo effect's gloomy cousin
Psychology
Negative expectations can make symptoms feel worse or create side effects.
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