OnewayANOVA

OnewayANOVA - Three therapies: conventional, experimental,...

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    1-way ANOVA & Post Hoc Tests
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    Learning Objectives Compute 1-way ANOVA and post hoc  tests by hand Correctly interpret F and post hoc tests  computed by hand Compute 1-way ANOVA and post hoc  tests using SPSS Correctly interpret SPSS printouts
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    ANOVA Partitions Variance Total variance is divided into Within groups – individual differences, nuisance  variance, basically, random error Tested with F = (treatment+error)/error. F = Between MS/ Within MS. If there is no treatment effect, F = error/error =  1.  If treatment effect, F should be > 1.
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    Example:  3 Therapies Treatment of panic attacks.
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Unformatted text preview: Three therapies: conventional, experimental, and control (wait list). DV is number of panic attacks during 1 week after 6 wks therapy (or wait). Work thru handout 1 together. Example 2: Memory- Enhancing Drugs Participants are given 1 of three drugs before memorizing a list of nonsense words to see if recall is improved. Drugs are melatonin, ginseng, and caffeine. DV is number of correct words recalled. Students work thru handout 2. Review. SPSS Review printout and compare printout to handout. If there is time, have students punch and analyze second example....
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OnewayANOVA - Three therapies: conventional, experimental,...

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