%0 Journal Article %T Target Size Manipulations Affect Error-Processing Duration and Success Perceptions but not Behavioural Indices of Learning %A Jamie Hawke %A Nicola J. Hodges %A Nicole T. Ong %J Brain Sciences | An Open Access Journal from MDPI %D 2019 %R https://doi.org/10.3390/brainsci9050119 %X We evaluated if and how success perceptions, through target size manipulations, impact processes related to motor learning. This work was based on recent literature suggesting that expectations and self-efficacy exert a direct impact on learning. We measured arousal, kinematics, learner expectancies, motivation, and outcomes in a dart-throwing task. Novices ( n = 29) were assigned to either a ˇ°Large-targetˇ± (horizontal target, 10-cm high) or ˇ°Small-targetˇ± (2-cm high) group for practice ( t = 90), and both groups completed 24-h retention tests. The Small-target group took longer to plan and process feedback in the pre-throw and post-throw periods, respectively, and showed larger joint amplitudes early in practice compared to the Large-target group. As predicted, the Large-target group made more hits and had heightened outcome expectancies compared to the Small-target group. Surprisingly, only the Large-target group performed better than they expected. Despite the Large-target group having more target hits, enhanced expectancies, and more unexpected success, this group did not outperform the Small-target group on behavioural indices of performance and learning. This research questions assumptions and results related to success-related manipulations for task performance and mechanisms related to target size manipulations. View Full-Tex %U https://www.mdpi.com/2076-3425/9/5/119