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contrast principle psychology - behavioral psychology illustration
Posted inDark Psychology

The Contrast Principle: How Comparison Warps Your Reality

Posted by Mário Machado October 25, 2026
Discover how the contrast principle psychology shapes human perception, pricing judgments, and negotiation dynamics through sequential comparisons.
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foot in the door technique - behavioral psychology illustration
Posted inDark Psychology

The Foot-in-the-Door Technique: Mastering Subtle Persuasion

Posted by Mário Machado October 18, 2026
Learn how the foot in the door technique uses small initial commitments to drive major behavioral compliance in sales, leadership, and daily life.
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misattribution of arousal psychology - behavioral psychology illustration
Posted inNeurobiology

The Misattribution of Arousal: How Adrenaline Tricks the Brain

Posted by Mário Machado May 14, 2026
Discover the misattribution of arousal psychology (Dutton & Aron, 1974): how the brain confuses physical adrenaline and fear with romantic attraction.
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forer effect psychology - behavioral psychology illustration
Posted inCognitive Biases

The Forer Effect (Barnum Effect): Why Vague Statements Feel Deeply Personal

Posted by Mário Machado May 11, 2026
Explore the forer effect psychology (Bertram Forer, 1948): why generic personality assessments feel uniquely tailored to us through subjective validation.
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illusory truth effect psychology - behavioral psychology illustration
Posted inCognitive Biases

The Illusory Truth Effect: Why Repetition Makes Falsehoods Feel True

Posted by Mário Machado May 3, 2026
Understand the illusory truth effect psychology (Hasher, Goldstein, & Toppino, 1977): why our brains mistake familiarity and processing ease for truth.
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decoy effect psychology - behavioral psychology illustration
Posted inCognitive Biases

The Decoy Effect: How Asymmetric Pricing Steers Your Decisions

Posted by Mário Machado May 2, 2026
Understand the decoy effect psychology (Huber, Payne, & Puto, 1982): how adding an inferior third option manipulates consumer choices and pricing.
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psychological reactance theory - behavioral psychology illustration
Posted inSocial Dynamics

Psychological Reactance: Why Your Brain Rebels Against Rules

Posted by Mário Machado May 2, 2026
Explore psychological reactance theory (Jack Brehm, 1966): why threats to personal freedom trigger defiance and how to communicate without resistance.
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benjamin franklin effect psychology - behavioral psychology illustration
Posted inSocial Dynamics

The Benjamin Franklin Effect: How Doing Favors Creates Liking

Posted by Mário Machado May 2, 2026
Explore the benjamin franklin effect psychology (Jecker & Landy, 1969): why asking a rival for a small favor makes them like and respect you more.
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boomerang effect psychology - behavioral psychology illustration
Posted inSocial Dynamics

The Boomerang Effect: Why Pushy Persuasion Backfires

Posted by Mário Machado May 2, 2026
Learn how the boomerang effect psychology (Hovland, 1953) explains why aggressive persuasion and censorship push people toward the opposite belief.
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About 99% Brain UP

Welcome to 99% Brain UP. We are a dedicated editorial team passionate about decoding human behavior, neurobiology, and the hidden mechanics of the mind. Our mission is to bridge the gap between complex behavioral science and everyday life, bringing you evidence-based insights every single day.

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Recent Posts

  • contrast principle psychology - behavioral psychology illustration
    The Contrast Principle: How Comparison Warps Your Reality
    by Mário Machado
    October 25, 2026
  • reward prediction error psychology - behavioral psychology illustration
    Reward Prediction Error Psychology: The Brain’s Dopamine Loop
    by Mário Machado
    October 24, 2026
  • cognitive dissonance psychology - behavioral psychology illustration
    Cognitive Dissonance: Why Your Brain Justifies Inconsistencies
    by Mário Machado
    October 24, 2026
  • confirmation bias psychology - behavioral psychology illustration
    The Confirmation Bias: Why We Only See What We Believe
    by Mário Machado
    October 23, 2026

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Exploring the intersection of behavioral science and daily life. We decode the complex patterns of the human mind through evidence-based insights and fascinating psychological discoveries.

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