PSYA01H3 Lecture Notes - Lecture 11: False Alarm, Optometry, Subliminal Stimuli
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Recall: weber is the one who recognized just noticeable differences (jnd) (e. g. of jnd, optometrist doing a vision test for an individual) A threshold is a structure, an entryway, changes. The a(cid:271)solute threshold is (cid:449)he(cid:374) (cid:449)e (cid:272)a(cid:374)"t dete(cid:272)t it, a(cid:374)d (cid:449)he(cid:374) (cid:449)e just dete(cid:272)t it. Subliminal perceptions work by placing a message that our conscious mind could not detect u(cid:374)der(cid:374)eath a pie(cid:272)e of (cid:373)edia, therefore (cid:373)a(cid:374)ipulati(cid:374)g a(cid:374) i(cid:374)di(cid:448)idual"s thoughts. It is unclear if it works, but advertisers do place messages that the eye usually cannot detect, hoping it works. Experimental context: we would see distinct trials and the stimulus may or may not be there, parti(cid:272)ipa(cid:374)ts (cid:373)ay say so(cid:373)ethi(cid:374)g is there e(cid:448)e(cid:374) (cid:449)he(cid:374) there is(cid:374)"t, they e(cid:374)d up guessing (sometimes they are right) Possible results of the experiment: correct rejection: when there is no stimulus and the participant says no. Hit: when there is a stimulus and the participant says yes.
