Evaluating backward chaining methods on vocational tasks by adults with developmental disabilities

Kobylarz et al. (2020) tested four ways to teach vocational tasks to adults with developmental disabilities.

Each adult tried all four styles in an alternating-treatments design. The styles were: teacher finishes the early steps, learner finishes the early steps, no one finishes the early steps, and a control condition.

The goal was to see which backward-chaining version produced the fastest mastery.

Participant-completion backward chaining won. The learner did every step, using least-to-most prompts only on the steps not yet mastered.

All four styles worked, and the new skills stayed strong one to four weeks later. Still, the learner-done version reached mastery first.

Lincoln et al. (1988) ran a similar alternating-treatments race between two prompting tactics for autistic students learning numerals. They also crowned one method—constant time delay—as the speed king.

Ozen et al. (2022) later compared simultaneous prompting and graduated guidance for preschoolers snapping and buttoning. Unlike Kobylarz, they found no clear speed winner; both tactics tied. The difference: adult vocational chains versus preschool self-care chains.

Lancioni et al. (2008) stepped away from trainer prompts entirely. They used automatic air or voice cues to guide adults with multiple disabilities through occupational chains. Their success shows that when staff time is tight, tech-based prompts can replace human-delivered backward chaining.

If you teach job skills to adults with developmental disabilities, start with participant-completion backward chaining. Let the learner touch every step and save your prompts for the new parts. You will likely see faster mastery without extra staff hours. If you later need hands-free support, consider adding automatic cues as shown in Lancioni et al. (2008).