PSYC 1010 Chapter Notes - Chapter 4: Far-Sightedness, Ganglion Cell, Stirrup

• School: York University
• Department: Psychology
• Course: PSYC 1010
• Professor: Doug Mc Cann

Document Summary

4. 1a: threshold: psychophysics : study of how physical stimuli are translated into psychological experiences o. Increasing stimulus past absolute threshold increases detection/ may also o damage organs. Just noticeable difference : smallest amount of difference that a sense can detect from a previous one o. Absolute threshold is the jnd from nothing to something: weber"s law : just noticeable difference is a constant proportion of the size of the previous stimulous o. Eight is 1/30, to feel just noticeable differnece from 300g you need 310g. Fechner"s sharp threshold with the concept of detectability and emphasizes that factors besides stimulus intensity influence detectability. 4. 1c: perception without awareness: subliminal perception : perceiving stimulus without conscious awareness o o o. 4. 1d: sensory adaptation : reduction to stimulus sensitivity: allows people to be aware of changes rather than constants. Light -> cornea -> iris -> lens -> retina (upside down) -> optical nerve -> occipital lobe.