Individuals with developmental disabilities often experience physical and mental chronic conditions from early childhood, which can negatively affect their education, employment, and social participation without appropriate interventions. These impairments frequently limit the acquisition of essential daily living skills, including personal hygiene skills. This study examined a multicomponent intervention package—comprising video prompting, step-by-step instruction based on task analysis, systematic error correction, and reinforcement—to support the acquisition of handwashing skills for two adolescents with developmental disabilities (Autism Spectrum Disorder and Intellectual Disability) and toothbrushing skills for one adolescent. A nonconcurrent multiple-baseline design across participants and skills was employed, including baseline, intervention, maintenance, and generalization phases. The intervention was conducted over eight weeks. The results indicated low and stable baseline performance for both participants, followed by a systematic increase in performance after the introduction of the intervention, reaching accuracy levels between 80% and 91%. Participants demonstrated meaningful improvements in hygiene skill performance following intervention. These gains were maintained over time and generalized to new settings, although a few task steps continued to require prompting. Furthermore, teachers and parents rated the intervention as highly feasible, practical, and useful for supporting hygiene skills, while students reported enjoyment, perceived improvement, and willingness to participate again. Overall, the findings suggest that structured, evidence-based instructional approaches may support increased functional participation in essential daily living skills, particularly when complete independence may not be attainable for all individuals.
Issa Alkinj (Fri,) studied this question.