PSYC 332 Study Guide - Final Guide: Stairmaster, Statistical Power, Demand Characteristics
9 Jul 2015
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Comparison between experimental group(s) and control group. Subjects experience one condition only: within-subjects (repeated measures) Thus, these variables can have no effect on the change in the dependent variable: good for establishing a baseline in polygraphs, fmri, etc. Reaction time studies need to be within- otherwise too much variability between subjects: sometimes we are especially interested in the comparison, why not let subjects make the comparison themselves, requires fewer participants. Also, within designs are more reliable, and have greater statistical power e. g. hypothesis: women with social anxiety will enjoy exercise more if it is in a private setting. Study: have women exercise on stair machine in public or. Within-subjects iv: setting time 1: laboratory stairmaster private setting. (private) **participants may vary in baseline levels of health and endurance, which is controlled for. **can look specifically in individual changes in exercise e. g. hypothesis: people will see the shots as closer for targets they do not like, vs. targets that they do like.
