Absolute Thresholds, Difference Thresholds, Weber's Law, & Signal Detection Theory
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Absolute Thresholds, Difference Thresholds, Weber's Law, & Signal Detection Theory
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In this video we discuss some of the ways in which we detect the presence of, as well as changes in, sensory information in our environment. Using examples from auditory, visual, and taste modalities, we describe the following concepts: Absolute Threshold: The minimum stimulus intensity required to detect that stimulus (approximately 50% of the time). Difference Threshold: The minimum change in stimulus intensity required to detect that change (approximately 50% of the time). Weber's Law: The Just Noticeable Difference (JND) of a stimulus will be proportional to the original stimulus intensity. Signal Detection Theory: Our perception of a stimulus depends on the presence of sensory information, and our judgement regarding the presence of that stimulus. Watch this video on YouTube here.