PSYC310 Lecture Notes - Lecture 5: Detection Theory, Absolute Threshold, Mammography

• School: University of Delaware
• Department: Psychology
• Course: PSYC310
• Professor: Vickery Timothy

Document Summary

Suppose i ask you to tell me if a tone was played on a given trial, but a ton (of. Around your absolute threshold, it"s often ambiguous whether you heard: people can vary in terms of their tendency to respond (cid:498)yes(cid:499) even if, this gets better is p(cid:523)tone(cid:524) = 0. 5, but the problem isn"t solved. A psychophysical theory that quantifies the response of an observer to the some audibility) is played on every trial. P (tone) = 1 something or not. Why? their ability to detect is equal, or vice-versa. Signal detection theory presentation of a signal in the presence of noise. Allows us to address the fact that the ambiguity of a near-threshold stimulus leads higher-level (non-sensory, non-perceptual) decision-related processes to play a strong role in responding. Decisions are made in the presence of noise, and sometimes the noise resembles the signal: costs and benefits play a big role.