PSY100Y5 Chapter Notes - Chapter 10: Detection Theory, Absolute Threshold, Psychophysics
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PSY100Y5 Full Course Notes
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Document Summary
Sensation: stimulation of sense organs, dependent on detectable stimulus. Perception: selection, organization and interpretation of sensory input, depends on attention. Psychophysics: the study of how physical stimuli are translated into psychological experience, how the physical reality is changing how we perceive the world. Fechner: the concept of the threshold. (blue, absolute threshold: detected 50% of the time. (red) Allows us to (cid:272)o(cid:373)pare differe(cid:374)t people"s data a(cid:374)d a real world: had to redefi(cid:374)e fe(cid:272)h(cid:374)er"s threshold to a(cid:271)solute threshold (cid:271)e(cid:272)ause of experi(cid:373)e(cid:374)ts. Psychophysical scaling: fe(cid:272)h(cid:374)er"s law: the twice as much difference at the threshold. Signal detection theory: sensory processes + decision processes. Subliminal perception: existence vs. practical effects: below your detectable limit. Optical illusions: discrepancy between visual appearance and physical reality. Dependent- probability of saying the line is larger and critical time (y) -130 to 180. Control variable- reference line (left) will always be 142 pixels.
