FRHD 3070 Lecture 18: FRHD 3070 Lecture 18
11 May 2020
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Document Summary
Research in the news: mindfulness can help weight loss: also encouraged intervention group to increase physical activity, the physical activity was actually likely what caused the weight loss, but the article claims it was the mindfulness program. *quasi = similar, so these designs are similar to randomization designs, however they don"t have randomization. Threats to internal validity on the table without randomization. Does not mean they are all bad. Group 1 x o: missing pretest as a comparison. I. e. , how many cigarettes you smoke: weak design. Group 1 o x o: also weak. Non-equivalent post-test only design say the program did (too many threats) Group 2 o: groups not randomized or equivalent (baseline differences between groups, selection bias (no way of knowing, no pretest) Group 2 o o: better, as there is a pretest. Later cohort o x o: can compare cohorts, based on the assumption that both cohorts are the same.
