10 Decision Making

Question 1

SDT: number and type of misclassifications

Answer 1

• number depends on overlap of distributions
• type depends on the strategy (placement of criterion

Question 2

Accumulation models: stimulation of input and output areas

Answer 2

• stimulation of input areas (sensory areas/MT) leads to increase in drift rate
• stimulation of output areas (LIP/IPS) leads to upward shift of the curve (biased starting point)

Question 3

Receiver operating characteristic (ROC) curve

Answer 3

• shape depends on discriminability
• criterion determines point on the curve

Question 4

AUC

Answer 4

• area under the curve
• measure of signal’s detectability/accuracy
• used to compare different models
• non-parametric: useful in more complex cases