Intro to Psychology; Sensation and Perception Notes

Chapter 3 Sensation and Perception
Sensation seeing hearingfeelingProcesssenseorgansmakeenviroenergylightsound neuralsignals

Perception howweinterpretsensoryinfo

physicist studyhowbraininterprentsphysicalpropertiesorstimuli
psycho
Hitexample whatpropertiesmakesfoodbitterorsweet
É
howfaintlightcanwesee toneswecanhear


intensityofstimulusdetected50
Absolutethreshold minimum
ofthetime
ble
signaldetectiontheorydetecting
stimulus bearrestedalsobyfatiguemotivationattention
can changes
perception


Alsodetectbarelynoticeablechangeinintensityorstimulus justnoticeableairferenceCina
ErnstWeber 17951878 characteristicor weber'slaw forfivesensesamountorchangeinstimulustomainenadependsonintensitythat
stimulusisist
p resented

issensationalwaysconscious Exampleyou taste
wont salttoalreadysaltydish
a irrerenceorteaspoonor You
wouldindish
an

subliminal
perception unconscious
perceptionosrtimuliIntensityorstimulusbelowabsolutethresholdnotconsciouslyawareofit

JamesVicary 1950s triedtopersuadepeopletobuypopcornbyputtingsubliminalsinmovies
didnotconducttrueexperiment studiesdon'thaveevidenceoraffective

ButEin else
withsomething
workwhenconnected
s
Example subliminal red traitCrisintainer orstituationfactors stayingup
bullcoincide wpersonality late persuasion

Also perceptionhelpswsocial
subliminal inter survival
Exampleseeing
angry andbehavior
facechangesreactions
earlylife
startsinvery

extrasensoryperception ESPorPSI gettinginfoonworldwithout
using 5senses read future
mindsseeing


norealevidence
vision soot



weseeeverythingthroughlightwavesthatarereflectedoreobjects
snakes

amplitude
aint
rood


mugging peaksorwaves
Distancebetween heightoreach
wave
peak

in
colorhueoflight
shortcool warm
colorslong colors
Ihigherbrighter
brightness

eyesconvert electromagneticwaves neuralsignal
nm

Saturation purity the
of light
bluelowsat bluemixedwwhite
satpure
examplehigh