PSY280H5 Study Guide - Midterm Guide: Detection Theory, Receiver Operating Characteristic, Audiogram
Document Summary
Measure of our detection of amount of capsaicin in chili peppers - stimulates somatosensory system. Psychosocial scale because rate their psychological experience as function of level of a physical stimulus. Participants must judge the stimuli along a certain property that goes up or down. Determines absolute thresholds (point where you are able to detect a stimulus) Method whereby observer controls level of stimulus and adjust it to be at the perceptual threshold. Determines subjective equality (setting of 2 stimuli at which observer experiences them identical) as observer sets this point by adjusting the level until appear identical. Minimum distance at which two touches are perceived as two touches, not one. It illustrates the jnd because if you perceive it as one, its below threshold, two is above threshold. 2 point touch thresholds differ across the body, jus as acuity changes across surface of eye"s retina. Response expansion means as strength of stimulus increases, perceptual response increases even more.
