PSY 105 Lecture Notes - Lecture 9: Random Assignment, Quasi, Psy
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Ex:(cid:9)multifactorial(cid:9)between-subjects(cid:9)design(cid:9)(toth(cid:9)et(cid:9)al. (cid:9)(2002)) (cid:9) (cid:9) (cid:9) (cid:9) (cid:9) (cid:9) (cid:9) (cid:9) (cid:9) (cid:9) Procedure:(cid:9) (cid:9) (cid:9) (cid:9) (cid:9) (cid:9) (cid:9) (cid:9) (cid:9) (cid:9) (cid:9) (cid:9) (cid:9) 2(cid:9)(maltreatment(cid:9)vs. (cid:9)no(cid:9)maltreatment)(cid:9)x(cid:9)3(cid:9)(treatment:(cid:9)ppp,(cid:9)phv,(cid:9)cs)(cid:9) (cid:9) not(cid:9)assigned(cid:9) (cid:9) assigned(cid:9) (cid:9) (cid:9) (cid:9) Quasi experimental designs but you cannot assign participants to a variable that is of importance. Cannot always assign members based on a particular status (e. g. , smoker vs. non- smoker; alzheimer"s vs. no alzheimer"s; male vs. female) Match groups as closely as possible on all other variables except the one you cannot assign. E. g. , make sure all the mend women in the sample are similar in age, ses, job status, etc. Statisti(cid:272)all(cid:455) test (cid:449)hether (cid:448)aria(cid:271)les affe(cid:272)t out(cid:272)o(cid:373)e (cid:894)e. g. , (cid:862)(cid:272)o(cid:374)trol for(cid:863)/test for age effects in analyses) Ex: multifactorial between-subjects design (toth et al. (2002)) (cid:271)a(cid:272)kgrou(cid:374)d: (cid:373)altreat(cid:373)e(cid:374)t has a (cid:374)egati(cid:448)e effe(cid:272)t o(cid:374) a (cid:272)hild"s se(cid:374)se of self (cid:894)e. g. , lovability, acceptability) and their expectations of relationships (e. g. , caring, supportive)
