“…These scales should improve the specificity and sensitivity of diagnoses while providing information likely to be of value in determining the effectiveness of treatment. Typical of these are the Zung Self-Rating Anxiety Scale (SAS), which has been adapted for use with the ID population (Lindsay & Michie, 1988), and the Self-Report Depression Questionnaire to evaluate depression in persons with mild and moderate ID (Esbensen, Seltzer, Greenberg, & Benson, 2005). Some improvements in differential diagnosis have been noted in the last few decades.…”