Comparison the effects of request feedback after good trials and poor trials in self-controlled environment

The aim of this study was comparison the effects of request feedback after good trials and poor trials in self-controlled environment. 30 students of ShahidBeheshti University participated in this study. The task required them to depress four keys (2, 4, 8, and 6) sequentially on the numeric keypad portion of the keyboard. The goal MTs for the 3 segments were 200, 400, and 300 ms (total MT: 900 ms) for the acquisition and retention phases. In the transfer phase, the goal segment times were 300, 600, and 450 ms (total MT: 1,350 ms). Thus, the relative timing (in all phases of the experiment was 22.2-44.4-33.3). Aafter the acquisition phase participants in regard to the filled questionnaire and compare the trials they request feedback or not, were assigned to good and poor trials group. To assess overall timing performance, the differences between the goal of overall MT and actual MT for each movement segment computed. Findings showed that there is no difference between request feedback after good trials and poor trials in acquisition, retention and transfer phases. These findings suggest that both, request feedback after good, or after poor trials leads to some beneficial effects on participants performance.