[PSYC 3270] - Final Exam Guide - Everything you need to know! (26 pages long)
29 Mar 2017
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Measuring perception: use an absolute threshold which is the minimum stimulus intensity that can just be detected, measuring thresholds. Fechner proved that there are many methods for measuring thresholds. Proposed three methods that all have in common the idea that human perception can be variable, so measurements at one time may differ from other times. Called classical psychological methods because they were the original methods used to measure the relationship between stimuli and perception. Limits: experimenter presents stimuli in either ascending or descending order, play a tone and find the crossover point, which is the intensity where the person goes from hearing it to not hearing it anymore, or vice versa. Adjustment: intensity is either increased or decreased until detection, but the observer is the one adjusting the intensity. Constant stimuli: experimenter presents many stimuli with different intensities in random order, threshold is the intensity that results in detection of 50% of the trials.
