A 2 (Group) × 3 (Instruction) ANOVA for mean square root transformed VPA difference scores yielded a marginally significant main effect for Instruction, F 2, 66) = 2.48, p = .092, d = 0.54.
A main effect for Instruction was found, F 2, 65) = 5.27, p < .01, d = 0.80, indicating that, in line with predictions, women who received the genital pain instruction reported highest levels of negative affect, whereas women who received the sexual enjoyment instruction reported lowest levels of negative affect.
Univariate and between-subject tests showed that the main effects for Group, Instruction and Reward were highly significant for errors as well as for response time (Table 2), indicating substantial differences between the groups in both measures and an influence of Reward and Instruction on performance.
The P300 was enhanced to the infrequent stimuli, but there was no main effect for target instruction, although instruction did impact a higher-order interaction.
The Cohen's d effect size for instruction across students in phase III was 0.19.
The Cohen's d effect size for instruction in phase II was 0.51.
However, we caution that attendance is not a direct proxy for the effects of instruction.
Significant interaction effects were found for Instruction by Group (p =.011), Reward by Group (p =.045), and Instruction by Reward (p <.001).
There was no interaction effect, but the main effects for height and instruction were significant (Table 1).
There was no significant interaction effect, but the main effects for height and instruction were significant (Table 1).
