What is the central claim of cognitive science?
Intelligent systems, including human minds, are mechanical systems
Ex. computers
Cartesian Theory of vision
The mind has an internal representation of the world
Representations are computed (manipulated) to recreate the reality of the external world.
What we see is our mind’s representation of the world
How do we infer the computations of the mind?
Measure behaviors that are controlled by the mind, through reaction time
Reaction time = how long it takes to respond to the representation of a stimulus
What was Donders’ experiment?
He was quantifying computations of the mind: decision-making time
He did it by measuring decision-making time by (perceiving light + decision making on which button to press + press button) - (perceive light + press the button)
The time it takes to decide is 100 milliseconds