Statistical Power Calculation
Assuming a medium-size effect (d = 0.25) and a medium-size correlation between measurements of 0.5, a power of β = 0.80 was achieved for the two-way within-subjects interaction term with a minimum sample size of 28 participants. Condom use intentions were measured four times during each experimental condition. Correlation coefficients of condom use intention scores within each condition ranged from 0.20 ≤ 