“…Several studies that directly compared questionnaire and performance-based methods of functional assessment found that these measures do not always correlate highly with each other, and further, they can provide different estimates of an individual’s ability to perform everyday activities (e.g., Burton, Strauss, Bunce, Hunter, & Hultsch, 2009; Finlayson, Havens, Holm, & Van Denend et al, 2003; Jefferson et al, 2008; Schmitter-Edgecombe et al, 2011; Tabert et al, 2002). For example, in a sample of cognitively healthy controls and individuals with MCI, Burton et al (2009) found low to moderate correlations (−.23 to .36) between a performance-based measure of functional abilities (i.e., Everyday Problems Test [EPT]; Willis & Marsiske, 1993) and several self- and informant-report measures.…”