PSY 250 Lecture Notes - Lecture 5: Confounding, Cognitive Psychology, Social Comparison Theory
8 Dec 2016
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Within subject designs (the psychology of the individual: fewer participants for a longer period of time, multiple levels of the iv, and measuring the dv at each level, no control group, participants receive each level of iv. (cid:862)groups(cid:863) are people who receive the same order. Iv 1 -> measure dv at this level of iv. Iv 2 -> measure dv at this level of iv. Iv 3 -> measure dv at this level of iv: each participant will experience each level of the iv. This (cid:449)a(cid:455) is good, (cid:271)ut : like pretest-posttest desig(cid:374) . There is mortality (people drop out as time goes on). There is fatigue (people get worse as time goes on). There is practice (people get better as time goes on). What must be eliminated for a within subjects design: effects of time. What must be reduced for a within subjects design: confounding variables.
