PSYC2008 Final: PSYC2008 Study Guide
Document Summary
Sensitivity (d") (more hits and fewer false alarms) vs. criterion ( ) (more hits and false alarms) Liberal (more false alarms and hits) vs. conservative (more correct rejection and miss") response criterion. Common measures - saccadic latency, saccadic trajectory (how the eyes move in space and what path they take), point of first fixation, total fixation time in a region of interest. Typically collect behavioural measures (eg: accuracy at the same time), but depends on population (eg: use on infants). Eye-tracking provides large amounts of data so important to pre-specify what your measure of interest is. Eye-tracking offers insight into implicit processes that precede functional outcomes, (such as making a correct response, avoiding a collision, etc. ) Electrophysiological marker of certain types of cognitive and perceptual processes. Erps are typically named for their polarity (+ vs -) and then when they occur, eg: p300, n170 (related to face processing).
