Psychology 1000 Chapter Notes - Chapter 5: Retina, James Vicary, Power Law

• School: Western University
• Department: Psychology
• Course: Psychology 1000
• Professor: Dr.Mike

Document Summary

Psychophysiology (receptor level, what happens to the eye?) Psychophsyics: relation between physical stimulus & psychological response. It"s hard to measure psychological intense, but you can measure the difference of sensitivity. Ex. turn the light on, you tell me your sense, turn the intensity of light higher, you tell me the difference. Threshold: the value of stimulus characteristic required to produce some response. Ex. vision: candle flame at 50 km on clear dark night (most sensitive sense in a human) Absolute threshold are the lower limit of the threshold. Hearing: tick of an old watch @ 6m (second most sensitive sense in human) Difference threshold: amount of change that"s necessary for jnd. Taste: tsp of sugar in 8l of water. Smell: 1 drop of perfume in a 6rm apt. Touch: wing of a fly falling on check from 1cm: ex. how much change you need to notice the difference.