PSYCH 3A03 Lecture Notes - Detection Theory, Psych, White Noise
6 Sep 2013
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This outline summarizes major points covered in lecture. It is not intended to replace your own lecture notes. Absolute detection thresholds tell psychoacousticians what the limits of detection are for sound parameters (e. g. frequency, amplitude and time). Often we are interested in the sensitivity of a listener to changes in an acoustic parameter. Discrimination procedures measure what a listener can respond to or just detect. S. s. stevens correctly pointed out that psychophysicists measure what a listener does respond to, and often this measure corresponds to what a listener can respond to, but not necessarily. We want testing procedures that provide a measure of listener sensitivity that does not change with the subject"s (s"s) response criterion. Psychoacousticians employ different measurement (testing) procedures to quantify a subject"s (s"s) perceptual sensitivity. Scaling procedures allow s to quantify subjective magnitude of stimulus. Matching procedures determine physical aspects of stimuli that ss use to equate different stimuli.
