PSYCH 241 Lecture 13: Psych 241 – Lecture 13
29 Nov 2016
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Document Summary
What happens to the f score for the interaction in the mixed design, relative to the. Research using procedures that resemble true experiments but lack the degree of control needed for causal inference (threats to internal validity present) Improve conditions in which people live and work (natural settings: test external validity of lab findings (do results generalize?) Quasi-experiments (resembling-: procedures that approximate the conditions of highly controlled laboratory experiments. Case studies / small-n experiments: research focused on individual(s) rather than groups. Program evaluation: applied research to learn whether real-life treatments work. Three key steps: random assignment, manipulation of iv, controlling for secondary variables. Causal inference 3 conditions: co-variation of events, time order relationship, elimination of plausible alternatives. Control of potential confounds (~no plausible alternatives) Clear outcomes regarding effect of iv on dv. Internal validity ability to draw casual inference iv dv: co-variation, time-order relationship, elimination of plausible alternatives. Manipulate independent variable (iv: condition 1 vs condition 2 on dv.
