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Problem Definition and Hypothesis
Decisions Preceding Research
Control in Experimentation
12 other sections not shown
American Psychological Association analysis anxiety assess attempt attitude baseline before-after design behavior bias Campbell Carlsmith causal conducted control group control techniques correlation counterbalancing criterion cross-lagged debriefing demand characteristics dependent determine discussed eliminate error ethical evaluation research example exist experiment experimental group experimental treatment condition experimenter bias extraneous variables Figure film frequently given group of subjects hospital hospital film hypothesis identify increase independent variable individuals influence interac internal validity investigator Journal levels of variation manipulation matching means measure ment method null hypothesis number of subjects observed obtained occur operational definition participate performance placebo population possible posttest potential presented pretest problem procedure produced psychological question random randomly assigned refers represent research design response revealed rival hypotheses sample scientific scientific method scientist scores selected sequencing effects significant single-subject Social Psychology specific time-series design tion treatment effect treatment groups Type I error validity variance