“…Hart, Werneke, George, and Deutscher (2012) report data from over 10,000 physical therapy outpatients which suggests that even a single mental health screening question may be valid and reliable. However, Reme, Lie, and Eriksen (2014), in research with clients who had chronic lower back pain, and Vahter, Kreegipuu, Talvik, and Gross-Paju (2007) with people with multiple sclerosis, are among many researchers who have found that while single question screening for depression may have adequate sensitivity (correctly identifying a person with depression, 'true positive') it is often lacking in specificity (correctly identifying a person who does not have depression, 'true negative'). That is, this truncated approach to screening tends to be over inclusive.…”