PSYCH-101 Lecture Notes - Lecture 22: Neural Adaptation, Ganglion Cell, Subliminal Stimuli
18 Sep 2020
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Sensation the physical processing of environmental stimuli by the sense organs. Perception the psychological process of interpreting sensory information. We don"t all experience the world in the same way. Psychophysics: the study of a relationship between the physical world and mental representations of that world. Absolute threshold the smallest amount of stimulation needed for detection by a sense (50% of the time) Just noticeable difference (jnd): the minimum difference between two stimuli needed to detect a difference between them 50% of the time. The size of the original stimulus matters. The more intense the original stimulus the larger the amount that needs to be added before you detect the difference. Weber"s law: size of the jnd (i. e. delta i) is a constant proportion of the original stimulus value. Signal detection theory: response to a stimulus depends on the person"s sensitivity and on a person"s decision criteria:
