“…This is because it can be difficult to clearly connect specific behaviors to distinct categories, because of symptom overlaps. It is possible to associate disruptive behavior and emotional issues with ID, ED, and LD (Landrum 2011; Polloway, Patton, and Nelson 2011; Pullen et al 2011) as well as with autism (Scattone et al 2002) and ADHD (Anhalt, McNeil, and Bahl 1998). Likewise, low achievement is a common characteristic across multiple disabilities (Donovan and Cross 2002).…”