PSYC 1010 Lecture Notes - Lecture 8: Detection Theory, Red Color, Proprioception
Document Summary
Together- phenomenological world = external reality (the same) + efforts to. Objective world still involves subjective sensing & perceiving. Sensation: psychophysics- vision (seeing), audition (hearing), olfaction (smell), Gustation (taste), somatosensory (touch), proprioception (perception of distance), Transduction: conversion of physical energy into language the brain understands. Sense receptors- specialized cell that transduce specific stimuli. Absolute threshold- lowest level of stimulus detectable in 50% of trials (generally speaking). Just noticeable difference (jnd)- smallest detectable change in intensity. Weber"s law- constant proportional relationship between jnd and the original intensity (the stronger the stimulus the greater the change necessary to detect the difference) In the dark, a phone screen is bright and can be seen easily. If the room is lit then the phone screen does not make a difference. Caveat: sensory adaptation- sensitivity to unchanging, repetitive stimuli diminishes over time. (after wearing a watch for a while, you don"t notice it"s there).
