PSY100Y5 Lecture Notes - Lecture 2: Absolute Threshold, Handia (Drink), Psychophysics

• School: UTM
• Department: Psychology
• Course: PSY100Y5
• Professor: Dax Urbszat

Document Summary

Psychophysics discipline in psychology of how physical stimuli are translated into psychological experience. Perception: selection, organization, and interpretation of sensory input. Fechner: created this concept: absolute threshold detected 50% of the time, needs to be redefined, not always detectable. Sensory processes (sensitivity) + decision processes (bias: hit, misses, false alarms, and correct rejections. Psy(cid:272)hophysi(cid:272)al s(cid:272)ali(cid:374)g: fe(cid:272)h(cid:374)er"s la(cid:449: the (cid:272)o(cid:374)(cid:272)ept of the threshold ((cid:374)o real a(cid:271)solute threshold ) Absolute threshold where stimulus is detected 50% of the time. Signal-detection theory: sensory processes + decision processes: no only sense signals but actually pay attention. Whe(cid:374) so(cid:373)eo(cid:374)e talks to you a(cid:374)d you k(cid:374)o(cid:449) they"re talki(cid:374)g (cid:271)ut you do(cid:374)"t know what they said. How this is relevant: illusions allow us to be able to see and pierce away how we see our perception and etc. Feature detection theory bottom-up processing (drake, started from the bottom) Allow you to see the same physical thing in 2 or more different ways illusions.