Self-Determination, Intellectual Disability, and Context: A Meta-Analytic Study.

Mumbardó-Helles et al. (2017) pooled 16 studies on self-determination. They asked: do gender, race, or the exact disability label change how big the gap is between people with and without intellectual disability?

All studies used the same self-determination scale. The team ran a meta-analysis to spot which context factors shift scores the most.

Context matters. Girls score closer to typical peers than boys. Black and Hispanic youth score lower than white peers, even with the same IQ range.

The label counts too. 'Intellectual disability' gives lower scores than 'learning problems' or 'developmental delay.'

Pitchford et al. (2019) extends this work. They show that adaptive behavior, a cousin of self-determination, is the real ticket to post-school jobs and living on your own.

Lyall et al. (2025) finds the same race effect in autism: Black kids get fewer diagnoses even when their trait scores match white kids. The pattern looks like under-recognition, not ability.

Zaidman-Zait et al. (2018) adds family income and support to the mix. Low resources drag down both parent mood and child adaptive skills, backing the idea that context, not just IQ, shapes outcomes.

Before you write a self-determination goal, check the kid's gender, race, and exact label. Expect lower scores for boys, Black or Hispanic youth, and those tagged 'ID.' Use that info to set fair baselines, not to limit goals. Push adaptive skills hard—Pitchford et al. (2019) show that is what really moves the post-school needle.