PSYC 2250 Lecture Notes - Lecture 8: Systematic Desensitization, Repeated Measures Design, Contiguity
24 Sep 2018
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Experiments: used to determine cause-effect relationships under controlled conditions: e. g. medical research on new drug, clinical research on new therapy. Recall (cid:498)cause(cid:499) = independent variable (cid:523))v(cid:524) (cid:498)effect(cid:499) dependent variable (cid:523)dv(cid:524) Researcher controls (manipulates) iv to determine effect on dv. Experimental group ------------ manipulate iv ----------- measure dv. Groups same on dv at start of experiment. Variety of control groups (cid:523)steve"s list(cid:524: no treatment (problems with?, wait-list control, pseudotherapy fake therapy (no active treatment, current best treatment, treatment alteration (e. g. , systematic desensitization) If groups differ on dv at end of experiment, conclude iv was cause. Blocking: contiguity vs. predictability (test of competing theories, experimental procedure (aversive classical conditioning cs used to suppress operant rate of bar pressing in rats. Behavior analytic (small n) research design: a = baseline (takes place of control group, b = treatment phase, a = reversal phase.
