Psychology 2115A/B Lecture Notes - Lecture 2: Absolute Threshold, Psychometric Function, Psychophysics

• School: Western University
• Department: Psychology
• Course: Psychology 2115A/B
• Professor: Stephen Lupker

Document Summary

Psychophysics- the relationship between the physical intensity of the stimulus and psychological response. Absolute threshold of a given stimulus: in experiment, intensity of stimuli is the independent variable, and the # of subjects responding to the stimuli is the dependent variable (can be graphed), psychometric function- measuring something psychological. To be distinguished by the psychophysical function (the relationship, function, relating the psychological response and the physical): the bigger the stimuli, the larger the response, two techniques he used: Wednesday, september 14, 2016: you set up an experiment when you pick a bunch of intensities below and above threshold. You will present each stimulus in a random fashion. eg. 20 times each. You just say, i heard it or i didn"t hear it: this removes perseveration and anticipation, you get an s-shaped curve, ***y axis probability yes, there is continually activity in your auditory system.