A 2 × 2 repeated measures ANOVA with condition (simulators vs. confessors) as a between subjects factor and memory test–retest (T1 vs. T2) as a within subjects factor was run on the free recall correctness score. The main effects of condition and memory test–retest were found significant, F(1,71) = 60.62, p < 0.001, ηp2 = 0.46, and F(1,71) = 8.86, p = 0.004, ηp2 = 0.11, respectively. The significant condition by test–retest interaction, F(1,71) = 24.66, p < 0.001, ηp2 = 0.26, showed that simulating participants reported more correct information at T2 than T1, t(35) = 7.83, p < 0.001, d = 2.00. This indicates that participants in the simulation condition properly followed their instruction. No difference was found for confessors in the proportion of correct information reported at the two memory phases, t(36) = 1.16, p = 0.25.