Factors associated with the risk of behaviour problems in adolescents with severe intellectual disabilities.

Dudley et al. (2008) asked which traits make behavior problems more likely in teens with severe intellectual disability. They gave surveys and tests to a group of 11- to 18-year-olds. The team looked at IQ, autism features, health issues, and family background.

The teens with the lowest IQs and clear autistic traits showed the most hitting, screaming, and self-injury. Kids who had not yet entered puberty also had higher scores. Gender, epilepsy, and social class had little or no link to problem behavior.

The same team studied younger children eight years earlier (O et al., 2000). That paper said daily-living skill gaps predicted sleep and self-injury issues. The new teen data shift the spotlight to raw ID severity and autism instead of skills alone.

A wider meta-analysis (K et al., 2003) agrees: severe ID plus autism is the top risk mix. Yet Dickson et al. (2005) seems to disagree. They found social deprivation drove antisocial acts in teens with ID. The clash fades when you see they counted poverty first in their stats; Dudley et al. (2008) did not. Take both results and you get a simple rule: check ID/autism first, then ask how poverty stacks on top.

Two later surveys extend the picture. Dworschak et al. (2016) show risk markers are weak once kids are in school, so classroom context matters. van Timmeren et al. (2016) add parent stress and low family quality of life as extra fuel for behavior. Put together, the story is clear: biology sets the stage, but family life and school supports shape the final script.

You can stop hunting for single causes. When a teen with severe ID shows aggression, first rate IQ and autism features, then scan for puberty stage and parent burnout. These quick checks guide you to skill-building or respite referrals before you write a behavior plan. Social class alone is not the red flag here; autism plus ID is.