Factorial Anova- Results

Topics: Analysis of variance, Main effect, Multiple comparisons Pages: 2 (633 words) Published: August 22, 2013
A 4(amount of alcohol: 0, 2, 4, 6 pints) X 2(type of lighting: dim, bright) within subjects Factorial ANOVA was conducted on attactiveness scores of chosen mate. Mauchly’s test indicated that the assumption of sphericity had been assumed for the main effect of alcohol amount, χ²(5) = 4.70, p > .05 and alcohol amount and lighting type interaction effect, χ²(5) = 2.58, p > .05. There was a significant main effect of type of lighting on attractiveness of chosen mate, F (1, 25) = 23.42, p <.001, partial η² = .48 (See table 1). Results showed that attractiveness score of the chosen mate was significantly higher in bright light (M = 53.44, SD = 5.82) than in dim light (M = 47.25, SD = 4.49). Table 1. Repeated Subjects Factorial ANOVA Summary Table

Source| SS| df| MS| F|
Between| 3281.83| 25| 131.27| |
Lighting| 1993.92| 1| 1993.92| 23.42*|
Error (Lighting)| 2128.33| 25| 85.13| |
Alcohol | 38591.65| 3| 12863.89| 104.39*|
Error (Alcohol)| 9242.60| 75| 123.24| |
LightingXAlcohol| 5765.42| 3| 1921.81| 22.22*|
Error (LightingXAlcohol)| 6487.33| 75| 86.50| |
Total| 67491.08| 207| 326.04| |
*p<.001

There was also a significant main effect of the amount of alcohol drunk, F (3, 75) = 104.39, p <.001, partial η² = .81 Post hoc comparisons using Bonferroni test indicated that attractiveness score of chosen mate was not different when people drunk none alcohol (M = 63.29, SD = 6.99) or 2 pints (M = 63.06, SD = 7.91). However, when people drunk 4 pints or 6 pints, they chose mates whose attractiveness score was lower than they chose after they drunk none or 2 pints alcohol. Furthermore, the attractiveness score of chosen mate was significantly lower when the people drunk 6 pint (M = 31.04, SD = 8.42) compared to the case in which they drunk 4 pint (M = 44.00, SD = 8.31). There was a significant interaction effect between the type of lighting and the amount of alcohol drunk, F (3, 75) =...
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