Piagetian principles: simple and effective application.

Staff in a large residential home ran a Piaget-style sensorimotor program with 25 adults who had severe intellectual disability.

The lessons used simple cause-and-effect toys, stacking cups, and water play.

A matched group of 25 peers got the usual day program and served as the comparison.

Trained residents gained about one month of adaptive age for every real year.

The untrained group showed almost no change.

Skills like dressing, scooping, and turning devices on carried over to daily routines.

Mansell et al. (2002) later showed similar gains using "active support" instead of a set curriculum. They taught staff to prompt and praise participation, proving the benefit can come from two very different paths.

Anonymous (2019) seems to disagree. That study gave staff the same active-support training but saw no jump in resident engagement. The homes in the 2019 paper had high staff turnover and younger, more capable residents, so extra prompts alone were not enough.

Carr et al. (1985) tried basic operant training to boost toy play in profoundly delayed children and got almost nowhere. Williams (1996) shows that a richer, stage-based sensorimotor curriculum can succeed where simple reinforcement failed.

You can lift adaptive skills in adults with severe ID without fancy tech. A low-cost shelf of sensorimotor toys and a clear lesson sequence did the job. If your site already runs active support, keep it; the two approaches stack. Where turnover is high, add the structured toy curriculum so new aides have a ready-made program instead of relying on moment-to-moment prompting.