PSYCH 2E03 Lecture Notes - Receiver Operating Characteristic, Detection Theory, Absolute Threshold
12 Jun 2013
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Document Summary
Brightness response compression: magnitude estimate decreases with stimulus intensity. Electric shock response expansion: magnitude estimate increases with stimulus intensity. Magnitude of estimation: line length comparison show standard line compared to another: linear function. Magnitude of estimation: colour brightness comparison response compression when show dots of two different brightness. Electric shock shows smallest weber"s constant and response expansion response expansion. Is there a true absolute threshold signal detection theory: there is no such thing as an absolute threshold. Under conditions of uncertainty the thresholds for sensory responses are influenced by various factors. Varies from individuals to individuals and in same individual at different times. Example: telephone rings while you are in the shower. Miss: no response, did not perceive ringing of the phone. Correct rejection: no response, phone did not ring. E. g. using a visual pattern: detect the presence of a visual pattern (signal) against a background (signal + noise) two common ways of testing:
