Several methodological and measurement issues should be addressed in future studies. Efforts should be made to expand the use of direct observation in assessing the impact of treatments aimed at the whole family as a unit. The recipients of future supportive interventions should include as many coresident family members as possible. Fathers, with separate complete posttest data and analyses, were included in only three of the studies and comprised 11% of the total sample. None of the studies looked at the emanative effects of supporting parents on siblings without disabilities. An analysis of the quality of these studies suggests that there is considerable room for improvement in the design, conduct, and reporting of intervention research.