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Department
Psychology
Course
Psychology 2115A/B
Professor
N/ A
Semester
Fall

Description
Lecture 3Psychophysics contemporary psychophysics scalingMcGennies Experiment 1949Perceptual defense mechanism present taboo words to experimenters to measure threshold Use ascending method of limits exposure timems to present words on screen to experimenters to see if they can perceive it accuratelyEventually threshold will be crossedNormal words 53 msTaboo 98 ms Difference between normaltaboo words also includes frequency of useTwomore independent variables being manipulated at the same time is called confound2 variables are varying concomitantlyProblem with confounds Cause of differenceeffect is unknown 1 Confound with frequency2Response bias eg afraid to admit seeing taboo wordsdoubtsHowens Soloman 1951People claim to perceive frequent words with lower threshold than infrequent wordsLength confounded with frequencyRYNHit PHMiss PHPM1YPMToneN False Correct PFAPR1alarmrejectionpFApR 10 xx xxPHx2510PFA
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