Question

Early in this chapter we described a study by Bartholow and Anderson (2002) examining how the experience of violence in video games influenced aggressive behavior for males and females. Their results suggest that increased violence increases aggressive behavior for males but has little or no effect for females. The following data are measures of aggressive behavior similar to the results obtained in the study. Factor A: Gender Factor B: Type of Game   Nonviolent violent   3 9   6 4 Female 2 5   2 8   4 4   7 6   9 12   9 16 Male 4 13   8 17   10 13   8 13 Use a two-factor ANOVA with α = .05 to evaluate the significance of the main effects and the interaction. Compute M, T, and SS for each of the four conditions. Factor A:Gender Factor B: Type of Game   Nonviolent violent Female M = M =   T = T =   SS = SS = Male M = M =   T = T =   SS = SS =   ∑X² =   Fill in the missing values of the following ANOVA table. Note: Do not round the MS values, but round the F statistics to two decimal places. Source SS df MS F Between treatments         Factor A (Gender)         Factor B (Type of Game)         A x B Interaction         Within treatments         Total         What are the critical F values? (Use two decimal places.) F Distribution Numerator Degrees of Freedom = 6 Denominator Degrees of Freedom = 16 0.01.02.03.04.05.06.07.08.09.010.011.012.0F F-criticalAA =   F-criticalBB =   F-criticalAxBAxB = Is there a main effect for factor A?    Is there a main effect for factor B?    Is there an interaction?    Calculate the effect size (η²) for the main effects and the interaction. (Use three decimal places.) η2AA2 =   η2BB2 =   η2AxBAxB2 = Describe the effect of the violent game compared with a nonviolent game on the aggressive behavior for males and for females. Overall, aggressive behavior in male subjects is      in female subjects, and aggressive behavior after a violent game is      after a nonviolent game. The violence of the game has      on the female participants, and      on the males.

Answer 1