Time course of experimental data and comparisons.

DDT, the delay detection threshold for the delayed visual feedback detection task; steepness, the steepness of the delay detection probability curve in the delayed visual feedback detection task; BBT, box and block test; NHPT, nine hole peg test; SR (+), stochastic resonance on-condition; SR (-), stochastic resonance off-condition. White circles, SR on-condition; gray circles, SR off-condition. **P < 0.01; *P < 0.05; Bonferroni-corrected. (A) Time course of the experimental data of 15 participants (Group A; mean age ± standard deviation, 21.0 ± 0.8 years; range, 20–22 years; 8 male participants) who conducted the tasks in the order of SR on-condition, off-condition, off-condition, and on-condition. Error bars represent the standard error or the standard deviation of the mean. (B) Time course of the experimental data of another 15 participants (Group B; 21.0 ± 0.8 years; range, 20–22 years; 8 male participants) who conducted the tasks in the order of SR off-condition, on-condition, on-condition, and off-condition. Error bars represent the standard error or the standard deviation of the mean.