Comparison of conditioning impairments in children with Down syndrome, autistic spectrum disorders and mental age-matched controls.

The team compared three groups of kids: autism, Down syndrome, and mental-age matches.

Each child tried the same set of learning games.

The games tested observational learning, conditional rules, and simple instrumental tasks.

Kids with autism had the most trouble on observational and conditional tasks.

Kids with Down syndrome stumbled mainly on instrumental, do-this-get-that tasks.

Mental-age peers handled all tasks more smoothly.

Amaral et al. (2017) and Godfrey et al. (2019) extend these results. They show that Down-plus-autism blends look more like mild autism in social areas, matching the milder conditional deficits seen here.

Solomon et al. (2011) seems to clash: adults with autism learned high-probability reinforcement fine. The gap closes when you notice Marjorie used simple reward tasks, while P et al. used tricky conditional rules. Different task, different deficit.

Kodak et al. (2015) give you a quick screen for the same conditional-discrimination weakness. Use their 5-minute tool to spot who will need extra teaching steps.

Match the lesson type to the learner. If the child has autism, break conditional and observational steps into smaller chunks and add extra visual cues. If the child has Down syndrome, shore up basic instrumental links with clear, immediate rewards. Stop using one-size-fits-all programs.