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Inattentional Blindness

Inattentional Blindness

Inattentional blindness is when you're so focused on one thing that you completely fail to notice something else right in front of you. Because attention is limited, our brains simply can't be aware of everything at the same time.

Details

What is Inattentional Blindness?

Inattentional blindness is the phenomenon where, while focusing attention on one object or task, a person fails to perceive another stimulus that is clearly present right before them. It became widely known through the famous 'invisible gorilla' experiment by Simons and Chabris in 1999.

Why Does It Happen?

Our attentional resources are limited:

  • Selective attention: The brain cannot process all information simultaneously, so it focuses on what it judges to be most important
  • Limited attentional capacity: When deeply absorbed in one thing, there is less capacity left to process other things
  • The influence of expectation: Things we don't anticipate are much easier to miss

    • The Classic Experiment

    In the 'invisible gorilla' experiment, participants focused on counting basketball passes. Meanwhile, a person in a gorilla costume walked across the screen — yet roughly half of all participants never noticed the gorilla at all.

    Effects in Everyday Life

  • Focusing on a phone call while driving can cause you to miss traffic light changes or pedestrians
  • Being absorbed in your smartphone means you may not hear someone calling your name right beside you
  • Losing track of how much time has passed while deep in work is a similar phenomenon

    • A Word from Mindy

    Don't be hard on yourself for missing something. Our brains are simply not designed to see everything at once. Every now and then, it helps to pause and take a moment to look around at the bigger picture.

    💡 Real-Life Example

    A classic example of inattentional blindness is when you're so absorbed in reading a text message that you walk right past a friend without recognizing them at all.

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    This content is for educational purposes and does not replace professional medical diagnosis.

    Inattentional Blindness (Inattentional Blindness) | 마음스캔 심리학 용어사전