The average reaction time (ms)

The average response time of correct responses

Processing speed

Hit rate (%)

The number of targets detected/ the number of targets × 100%

Hit: correct response, concentration

False alarm rate (%)

The number of responses to non-target stimuli/the number of non-target stimuli × 100%

False alarm: impulsivity


z(Hit) - z(False)

Perceptual sensitivity (the ability to discriminate between the target and

non-target stimuli)

Response bias β

Vertical coordinates of Hit/Vertical coordinates of False

Impulsivity and conservation (the subject’s criterion or “willingness” to report detection of a signal)