PS262 Chapter Notes -Detection Theory, Spectral Sensitivity
Document Summary
1) only one stimulus intensity is presented, and. 2) on some of the trials, no stimulus is presented. Experiment, when the tone is presented: says yes on 90 trials. This correct response saying yes when a stimulus is present is called a hit in signal detection terminology: says no on 10 trials. This incorrect response saying no when a stimulus is present is called a miss. When no tone is presented: says yes on 40 trials. This incorrect response saying yes when there is no stimulus is called a false alarm: says no on 60 trials. This correct response saying no when there is no stimulus is called a correct rejection. Receiver operating characteristic (roc) curve: a graph in which the results of a signal detection experiment are plotted as the proportion of hits versus the proportion of false alarms for a number of different response criteria.
