PSY 3108 Study Guide - Final Guide: Detection Theory, Receiver Operating Characteristic, Dorsal Root Ganglion

• School: University of Ottawa
• Department: Psychology
• Course: PSY 3108
• Professor: Charles Collin

Document Summary

Quantitative: threshold seeking methods measure a physical quantity = limit of perceptual ability: absolute threshold: smallest detectable physical quantity, difference threshold: smallest detectable difference between 2 quantities (just noticeable difference) Staircase: stimulus presented at an arbitrary level; intensity changes based on perception; repeat until several reversals are obtained; threshold is average of reversal points (peaks & dips) X-alternative forced choice variations: participant is given 2-8 options to choose from- only 1 has stimulus: modification of (+) threshold-seeking methods; eliminates response bias (criterion) Criterion (re bias): tendency to say yes/no; decreases up & right of roc curve. Isosensitivity roc curve: ph & pfa (c(cid:895) (cid:272)a(cid:374) = sa(cid:373)e d" (cid:449)he(cid:374) se(cid:374)siti(cid:448)it(cid:455) is the sa(cid:373)e, (cid:271)ut (cid:272)(cid:396)ite(cid:396)io(cid:374) shifts (cid:894)payoff matrix) c<0 = yes>no c>0 = yes