“…One persistent problem in the measurement of emotions is the failure to discriminate anxiety from depression in self-report (Feldman, 1993). Despite an overwhelming theoretical consensus that anxiety and depression are different emotional experiences (e.g., Beck, 1976;Izard, 1977;Ortony, Clore, & Collins, 1988;Pennebaker, 1982;Plutchik, 1980;Wallbott & Scherer, 1989), researchers have generally been unable to separate them reliably.…”