“…Overall, the results obtained in these two experiments confirm several points uncovered in previous research. Many studies have found that taking a prior test improves performance on a future test (e.g., Carpenter & DeLosh, 2006;Roediger & Karpicke, 2006b;Wheeler & Roediger, 1992; for a review, see Roediger & Karpicke, 2006a) and that providing feedback after an initial test enhances subsequent test performance (e.g., Butler, Karpicke, & Roediger, 2007;Butler & Roediger, 2008;McDaniel & Fisher, 1991;Pashler et al, 2005). In addition, several studies have found that providing feedback after incorrect responses is critical to correcting errors (e.g., Lhyle & Kulhavy, 1987;see Bangert-Drowns et al, 1991), especially those errors committed with high confidence (Butterfield & Metcalfe, 2001.…”