Survey research and design in psychology/Tutorials/ANOVA/Mixed-design ANOVA

==Mixed-design ANOVA==

This dataset and exercise is from Francis (2007)
 * 1) Data file: AQUES.sav (not currently available)
 * 2) Design: The design is a 2 (birth order) x (2) (reaction time) mixed ANOVA:
 * 3) IV (between-subjects) = Birth order (1st/Subsequent)
 * 4) IV (within-subjects) = Hand (dominant/non-dominant)
 * 5) DV = Reaction time
 * 6) Research questions:
 * 7) Do reaction times different between first-born and subsequently born people (between-subjects main effect)?
 * 8) Do reaction times differ between the dominant and non-dominant hand (within-subjects main effect)?
 * 9) Is there an interaction between hand and whether people are first-born for reaction times?
 * 10) Descriptive statistics:
 * 11) Create a composite score of the within-subjects variable in order to be able to get the marginal total descriptives
 * 12) Via Analyse - Descriptives - Means
 * 13) Graphing: Clustered bar chart, clustered error-bar chart, and line graphs could be useful, but only present one in a Results section.
 * 14) Analysis: Analyze - General Linear Model - Repeated measures - Specify the within-subject factor as Hand with 2 levels, then Define and add First-born as a between-subjects factor - Plots (optional) - Options (Descriptive statistics, Effect sizes, Power, Homogeneity tests)