Outlook
In complex tasks, self-estimation might be too difficult to detect good trials. However, self-estimation has been declared to be important for learning [13, 14]. In further studies, it should be evaluated how task complexity affects self-estimation. Moreover, it should be investigated if externally imposed feedback after good trials is more effective than self-controlled
feedback, which promotes self-estimation. Finally, it would be interesting to compare self-controlled terminal feedback to other types of feedback, e.g. concurrent feedback provided in different modalities, to figure out which type of feedback facilitates learning of complex motor tasks best