Sport Sciences Research Institute Motor Behavior 2538-273X 11 37 2019 10 23 Mental Fatigue Impair the Effect of Feedback to Successful Trials in Motor Learning Mental Fatigue Impair the Effect of Feedback to Successful Trials in Motor Learning 135 150 1707 10.22089/mbj.2019.7085.1777 FA Milad Khojasteh Moghani M.Sc. Student of Motor Behavior, Hakim Sabzevari University Rasool Zeidabadi Assistant Professor of Motor Behavior, Hakim Sabzevari University 0000-0001-9132-2475 Mohammad Reza Shahabi Kaseb Assistant Professor of Motor Behavior, Hakim Sabzevari University Iman Bahreini Boroojeni Ph.D. Student of Motor Behavior, Shahid Beheshti University Journal Article 2019 02 08 Mental fatigue is a psychological state created by long periods of cognitive activity. The effect of mental fatigue on learning of motor skills has been less studied. Therefore, the purpose of this study was to investigate the effect of mental fatigue on the effectiveness of feedback to successful trials in learning of force production task. For this purpose, 44 non-athlete male students (18-25 years) were divided into four groups based on mental fatigue and type of feedback. Stroop test was used to create mental fatigue. MFI and VAS questionnaires were used to ensure that mental fatigue was created. At the acquisition phase, all participants in 12 block of six trials to produce criterion power. Immediate retention tests and transfer test 1, 10 minutes later and transfer test 2 was performed 24 hours after acquisition phase without feedback. To analyze the data, mixed ANOVA with repeated measures for the acquisition phase, and two-way analysis of variance were used in retention and transfer tests. The findings of this study showed that in the acquisition phase, the effect of blocks was significant and all groups have significantly improved during the acquisition phase. The results of retention and transference tests showed that the main effect of mental fatigue was significant, but the main effect of feedback and interaction of mental fatigue with feedback were not significant (except in the retention test). These findings suggested that mental fatigue may lead to the loss of benefits of feedback to successful trials and decrease of motor learning. Mental fatigue is a psychological state created by long periods of cognitive activity. The effect of mental fatigue on learning of motor skills has been less studied. Therefore, the purpose of this study was to investigate the effect of mental fatigue on the effectiveness of feedback to successful trials in learning of force production task. For this purpose, 44 non-athlete male students (18-25 years) were divided into four groups based on mental fatigue and type of feedback. Stroop test was used to create mental fatigue. MFI and VAS questionnaires were used to ensure that mental fatigue was created. At the acquisition phase, all participants in 12 block of six trials to produce criterion power. Immediate retention tests and transfer test 1, 10 minutes later and transfer test 2 was performed 24 hours after acquisition phase without feedback. To analyze the data, mixed ANOVA with repeated measures for the acquisition phase, and two-way analysis of variance were used in retention and transfer tests. The findings of this study showed that in the acquisition phase, the effect of blocks was significant and all groups have significantly improved during the acquisition phase. The results of retention and transference tests showed that the main effect of mental fatigue was significant, but the main effect of feedback and interaction of mental fatigue with feedback were not significant (except in the retention test). These findings suggested that mental fatigue may lead to the loss of benefits of feedback to successful trials and decrease of motor learning. https://mbj.ssrc.ac.ir/article_1707_02f039058bd48307e6f653a2005c9dd2.pdf