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Two systems of thinking - Fast & Slow

https://en.wikipedia.org/wiki/Thinking,_Fast_and_Slow

Thinking, Fast and Slow summarizes research that Daniel Kahneman conducted over decades, often in collaboration with Amos Tversky.

There are two systems of thinking

Kahneman describes two different ways the brain forms thoughts:

  • System 1: Fast, automatic, frequent, emotional, stereotypic, unconscious. Examples (in order of complexity) of things system 1 can do:
    • determine that an object is at a greater distance than another
    • localize the source of a specific sound
    • complete the phrase "war and ..."
    • display disgust when seeing a gruesome image
    • solve 2+2=?
    • read text on a billboard
    • drive a car on an empty road
    • come up with a good chess move (if you're a chess master)
    • understand simple sentences
    • connect the description 'quiet and structured person with an eye for details' to a specific job
  • System 2: Slow, effortful, infrequent, logical, calculating, conscious. Examples of things system 2 can do:
    • brace yourself before the start of a sprint
    • direct your attention towards the clowns at the circus
    • direct your attention towards someone at a loud party
    • look out for the woman with the grey hair
    • dig into your memory to recognize a sound
    • sustain a higher than normal walking rate
    • determine the appropriateness of a particular behavior in a social setting
    • count the number of A's in a certain text
    • give someone your phone number
    • park into a tight parking space
    • determine the price/quality ratio of two washing machines
    • determine the validity of a complex logical reasoning
    • solve 17 × 24
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