Study Question Study Question What advantages do modern psychophysical What advantages do modern psychophysical methods (e.g., TSD- -based measures) offer based measures) offer methods (e.g., TSD over the classical methods? What are their over the classical methods? What are their disadvantages, if any? disadvantages, if any?
The Sensory Threshold Concept The Sensory Threshold Concept
Classical Psychophysics Classical Psychophysics
Difference Thresholds or Just Difference Thresholds or Just Noticeable Differences (JNDs JNDs) ) Noticeable Differences (
Weber’s Law: Δ I / I = k
Theory of Signal Detection Theory of Signal Detection
Modern Forced- -Choice Choice Modern Forced Psychophysical Methods Psychophysical Methods
Psychophysical Scaling Psychophysical Scaling
Stevens’ Power Law: P=kS n
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