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Posted inDark Psychology

The Contrast Principle: How Comparison Warps Your Reality

Posted by Mário Machado October 25, 2026
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contrast principle psychology - behavioral psychology illustration
Posted inNeurobiology

Reward Prediction Error Psychology: The Brain’s Dopamine Loop

Posted by Mário Machado October 24, 2026
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reward prediction error psychology - behavioral psychology illustration
Posted inSocial Dynamics

Cognitive Dissonance: Why Your Brain Justifies Inconsistencies

Posted by Mário Machado October 24, 2026
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cognitive dissonance psychology - behavioral psychology illustration
Posted inCognitive Biases

The Confirmation Bias: Why We Only See What We Believe

Posted by Mário Machado October 23, 2026
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confirmation bias psychology - behavioral psychology illustration
Posted inDark Psychology

The Zeigarnik Effect: Why Unfinished Tasks Haunt Your Brain

Posted by Mário Machado October 22, 2026
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zeigarnik effect psychology - behavioral psychology illustration
Posted inNeurobiology

The Amygdala Hijack: Why Your Brain Loses Control in Seconds

Posted by Mário Machado October 21, 2026
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amygdala hijack psychology - behavioral psychology illustration
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contrast principle psychology - behavioral psychology illustration
Posted inDark Psychology

The Contrast Principle: How Comparison Warps Your Reality

reward prediction error psychology - behavioral psychology illustration
Posted inNeurobiology

Reward Prediction Error Psychology: The Brain’s Dopamine Loop

cognitive dissonance psychology - behavioral psychology illustration
Posted inSocial Dynamics

Cognitive Dissonance: Why Your Brain Justifies Inconsistencies

confirmation bias psychology - behavioral psychology illustration
Posted inCognitive Biases

The Confirmation Bias: Why We Only See What We Believe

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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emotional contagion psychology - behavioral psychology illustration
Posted inSocial Dynamics

The Emotional Contagion Effect: How Moods Spread Through Groups

Posted by Mário Machado May 2, 2026
Explore emotional contagion psychology (Elaine Hatfield, 1993): how human brains unconsciously catch and synchronize with the emotions of people nearby.
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pratfall effect psychology - behavioral psychology illustration
Posted inSocial Dynamics

The Pratfall Effect: Why Imperfection Makes You More Likeable

Posted by Mário Machado May 2, 2026
Discover the pratfall effect psychology (Elliot Aronson, 1966): why competent people become significantly more likeable when they show minor flaws.
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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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spotlight effect psychology - behavioral psychology illustration
Posted inCognitive Biases

The Spotlight Effect: Why Nobody Notices Your Mistakes as Much as You Think

Posted by Mário Machado May 2, 2026
Learn how the spotlight effect psychology (Gilovich, Medvec, & Savitsky, 2000) causes us to overestimate how much others notice our flaws and mistakes.
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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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chameleon effect psychology - behavioral psychology illustration
Posted inSocial Dynamics

The Chameleon Effect: How Subconscious Mimicry Builds Trust

Posted by Mário Machado May 2, 2026
Discover the chameleon effect psychology (Chartrand & Bargh, 1999): how subtle posture and speech mimicry triggers empathy, rapport, and social trust.
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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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contrast principle psychology - behavioral psychology illustration
Posted inDark Psychology

The Contrast Principle: How Comparison Warps Your Reality

Posted by Mário Machado October 25, 2026
reward prediction error psychology - behavioral psychology illustration
Posted inNeurobiology

Reward Prediction Error Psychology: The Brain’s Dopamine Loop

Posted by Mário Machado October 24, 2026
cognitive dissonance psychology - behavioral psychology illustration
Posted inSocial Dynamics

Cognitive Dissonance: Why Your Brain Justifies Inconsistencies

Posted by Mário Machado October 24, 2026
confirmation bias psychology - behavioral psychology illustration
Posted inCognitive Biases

The Confirmation Bias: Why We Only See What We Believe

Posted by Mário Machado October 23, 2026

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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