PSY100Y5 Lecture Notes - Lecture 2: Absolute Threshold, Psychophysics, Dependent And Independent Variables
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PSY100Y5 Full Course Notes
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The reference line on the left never changes (dependent variable) pixels - 141. The comparison line on the varies in length (independent variable) pixels range: 130-180. *we will control them but without control balance* lab 1 counter balance lab 2 randomize measuring reaction time, Perception: selection, organization, and interpretation of sensory input. Psychophysics: the study of how physical stimuli are translated into psychological experience. Figure 4. 1 illustrates the difference between sensation and perception. Fechner: the concept of the threshold, he was interested in finding out the weakest detectable stimulus: absolute threshold: detected the stimulus 50% of the time, just noticeable difference (jnd): smallest difference detectable. Weber"s law: size of jnd proportional to size. Threshold: dividing point between energy levels, where anything below is not detectable and anything above is 100% detectable. The method of constant stimuli: example there"s a bunch of different intensity presented to you and you have to say whether you detected it or not.
