Interactions of High School Students With Intellectual and Developmental Disabilities in Inclusive Classrooms.

Researchers watched 12 high-school students with intellectual or developmental disabilities in inclusive classrooms. They used 10-second momentary time sampling for 30 minutes a day across four days.

The team counted peer talk, teacher talk, and no interaction at all. They compared these rates to typical classmates in the same rooms.

Students with IDD talked to peers only a large share of the time and to teachers only 10% of the time. That is one peer chat every four minutes and one teacher chat every ten minutes.

Typical classmates interacted three times more often. Most intervals showed the IDD students sitting quietly without any social contact.

Matson et al. (2009) saw the same gap in adults: people with ID have tiny three-person social networks and little paid work. Yun-Ching et al. show the gap starts in high school.

Beadle-Brown et al. (2002) followed teens with ID for years and found social problems stay fixed. Their data extend this snapshot, warning that low interaction now likely means low interaction later.

Friman (2014) tracked mild-ID students after graduation and found jobs and college outcomes stayed poor. Together the three studies trace a straight line: sparse classroom talk turns into sparse adult life.

If you serve high-school students with IDD, do not assume inclusion alone builds social skills. Measure interaction live or on video, then add peer-mediated scripts, group contingencies, or teacher prompts to raise those rates before graduation. Target at least one peer exchange every minute and one teacher check every five minutes as an initial benchmark.