Berry and colleagues (1989) developed the Memory Self-Efficacy Questionnaire (MSEQ). This metacognitive measure is a cross between a self-report and actual measure of metacognition. It requires respondents to rate their confidence of remembering grocery lists, phone numbers, pictures, locations, words, and digit span. Essentially, in the MSEQ, respondents are given up to 10 pictures (or grocery items), then they are asked how confident they are in remembering 2 items, then 4 items, then 6 items, then 8 items, then all 10 items. It has been found to be both reliable and valid in many populations. For more information check out the original article by Berry et al. (1989).