Drew et al. [2002] compared an intensive behavioral intervention for children with autism with a group that received local services consisting of home visiting based on the Portage Project model. They randomly assigned parents to the two groups and found significant reduction in parental distress in the BPT group. Cognitive behavioral training interventions were also compared to other forms of parent support. Kirkham [1993] randomly assigned parents to either a coping skills educational group or a support group, which did not include skills training. Similarly, Singer et al. [1994] randomly assigned parents to either a multiple component treatment or an informational support group that met for the same amount of time as the coping skills group, but received only didactic information. Two multicomponent interventions also used alternative treatment comparison groups with random assignment.