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PSYCH 291 (44)
Lecture

comparison groups PSYCH 291

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Department
Psychology
Course
PSYCH 291
Professor
Joanne Wood
Semester
Fall

Description
Using comparison groups to rule out alternative explanations Example: therapy outcome research What possible confounds need to control for? *Depends on research area *What is state of the art? *e.g., alcohol expectancy in MacDonald et al. *Placebos in drug research *Example: therapy outcome research Therapy outcome research *When researchers develop a new treatment for a psychological disorder, they want to test the efficacy of the new treatment. OGPTPT Design True experiment *3 types of confounds: *3 variables *Other threats to internal validity *By-product of operationalization True Experiment “non-specific factors”— e.g., *therapist attention, warmth, & empathy *ability to arouse hope in clients *simply undergoing a procedure designed to ameliorate a problem Common to all therapies
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