This study tested the extent to which a behavioral intervention, Strategies to Promote Independence in Dressing (SPID), improved dressing independence among 90 cognitively impaired nursing home residents (average score on Mini Mental Status Exam = 7.35 +/- .69). The effect of SPID on caregiving efficiency, the time required for nursing assistants to use the strategies, was also examined. The results showed improved independence (decrease in assistance) from 6.08 +/- .12 at baseline to 4.93 +/- .19 following 6 intervention weeks. This significant improvement in dressing independence occurred without a clinically relevant increase in caregiver time (less than 1 min). Seventy-five percent of the subjects improved one or more levels of dressing independence, and more than 20% achieved their maximum intervention effect during the first week of treatment.