Psychology Research Methods: Quasi-Experiments, Non-Equivalent Groups, and Correlations - , Study notes of Psychology

Download Psychology Research Methods: Quasi-Experiments, Non-Equivalent Groups, and Correlations - and more Study notes Psychology in PDF only on Docsity! 031:010 - Research Methods in Psychology – Spring, 2009 – May 7th SV Quasi-Expts 2 S O S O vs R X1 O X2 OS R X2 O X1 O R X1 O X2 O S R X2 O X1 O plain, old, comparison between two types of people classic, counter-balanced, within-subjects, PxE design Other not-quite-Expts 5  aging studies – when time is of interest (for once) longitudinal vs cross-sectional time-frame vs cohort effects  single-group within-subjects reversal designs confound with time  semi-permanent manipulations (“fixes”) non-equivalent control groups and/or control measures confound with time and external events Correl Studies 6 X Y (e.g., pet ownership) (e.g., [lower] depression) Z (“spurious” ) Phase 1: eliminate one direction between X and Y via stability logic or a cross-lagged study Phase 2: eliminate possible third (Z) variables via extreme stability logic or partial correlations (e.g., outdoors) Design-type Hierarchy  Strict Experiments IV → DV key issue: within vs between (case closed)  SV Quasi-Experiments key issue: relative stability  Non-Equivalent Group Designs key issue: confound(s) with group  Correlational Studies X & Y + Zs key issue: cause & effect (??????) 7