Complex Anova Worksheet PDF

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PSYC 316 – COMPLEX TYPES OF ANOVA 1. Explain the perfect situation for using a covariate, and a situation where it is used incorrectly (hint, think about the variances broken down). What is the main difference between these situations, and why is it important? 2. Give an example of a research situation where ANCOVA would be the most appropriate statistical technique. 3. You are the manager of a rock band and want to know which band member (Malcolm or Andy) writes better songs, and whether this depends on the type of song (a symphony or heavy metal song about flies). The dependent measure will be the number of screams of torment elicited by audience members during the songs (so the more screams, the worse the song). What type of analysis should be conducted? Interpret the SPSS output below.

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4. What does the between-group sum of squares assess? What does the within-group sum of squares assess? 5. Draw a table giving an example of a 3 x 3 factorial design. 6. Explain how to interpret a GLM model with an interaction term. 7. Draw flowcharts indicating how the variance can be broken down for the following types of ANOVAs: ANCOVA, Factorial ANOVA, Repeated Measures ANOVA 8. Look at the abstract and figures from the following study. The study authors reported that there were two significant two-way interactions. Using the information provided, explaining the plausible interactions between self-concept with gender and smoking stage.

Thornton, W., Douglas, G.A., & Houghton, S.J. (1999). Transition through stages of smoking: The effect of gender and self concept on adolescent smoking behavior. Journal of Adolescent Health, 25, 284-289.

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9. Researchers are concerned that new cell phone technology may be adversely impacting language development. Specifically, they are concerned that individuals who are avid users of text messaging develop poor grammar skills. They randomly assign individuals into a text message or control category. Neither group had previous cell phone text message use. The text message group is given cell phones with unlimited text messages per day. They evaluate participants’ grammar before and after the six month group assignment. What type of analysis should be conducted? Interpret the output

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