“…Recently, however, many researchers have found that the eff ectiveness of self-controlled feedback varies in accordance with task diffi culty (e.g., simple and complex), subject and task characteristics (e.g., age, open and closed skills), practice conditions (blocked vs. random), forms of knowledge contained in feedback (knowledge of result, knowledge of performance), motivation, ability to process information, and when combined with other learning manipulations ( Yook, Yoon, & Lee, 2005 ;Aiken, et al ., 2012 ;Ali, Fawver, Kim, Fairbrother, & Janelle, 2012 ;Carter, Carlsen, & Ste-Marie, 2014 ). For example, Bund and Wiemeyer (2004 ) investigated whether self-controlled feedback would enhance a complex motor skill learning.…”