PSY100Y5 Study Guide - Midterm Guide: Parallax, Trichromacy, Visual Cortex
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PSY100Y5 Full Course Notes
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You will perceive something as more intense if you have a lower absolute threshold for that stimulus. An absolute threshold is the specific type of sensory input that is the minimum amount of stimulation that an organism can detect 50% of the time. A jnd (just noticeable difference) is the minimum amount a stimulus can change so the person will perceive the stimulus differently. Weber"s law states that the jnd is a constant: it is 1/30 of the original stimulus. (ex: 100hz. You are going to detect a difference in the stimulus when the frequency hits 103. ) Signal detection theory states that it depends on both sensory and perception stimulus. Your decision is a factor in detecting stimuli or not. (ex: you need to be sure you actually detected a frequency change). Can be hits, misses, false alarms, correct rejections. You can tell people to do something that they are not consciously aware of.
