PSYC 3130 Lecture Notes - Lecture 8: Analysis Of Variance, Null Hypothesis
13 Apr 2016
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Document Summary
Compares means still, but with two or more independent variables. Each factor has 2 or more levels (one independent variable may be affected and not the other) Within a factorial, there are main effects (impact of one variable only collapsing on others). So, a poor car is honked at no matter what time of day. Interaction: two factors at work (approached by a female on a swinging bridge results in males reinterpreting fear as love). Influence of one iv on the dv depends on value/level of another iv. When you speak of an interaction it always depends. Pinching: joining together two means, or groups. Take end of one line and pinch towards middle. This creates a marginal mean for a group. There is no limit to the number of groups or factors in a factorial anova. Under null, no difference among population means. Sums of squares: ssr, ssab, ssa, ssb. G= grand mean, sum of all scores.
