The research literature suggests that functional behavioral assessment procedures provide effective strategies for identifying environmental conditions that may influence behavior. Functional assessments are conducted to discover antecedent stimuli or reinforcing contingencies that are functionally related to problematic behavior. Most published research on functional assessment involves trained behavior analysts investigating challenging behaviors of people with developmental disabilities. The purpose of the present study was to teach functional assessment skills to parents of children with autism so that they would be able to (a) determine the functions of their children’s challenging behaviors independently or with minimal guidance by the investigator, and (b) teach their children alternative, socially appropriate, and functionally equivalent responses. Pre and post self-report forms were also administered to measure hypothesized improvements in levels of parental stress and perceived sense of competency in parenting. The investigator visited two families and videotaped problematic family routines identified by the parents. The effectiveness of the intervention was evaluated with a multiple baseline across individuals design. Results supported the first hypothesis and partially supported the remaining four: Mothers were able to determine probable maintaining variables of their children’s targeted behavior independently or with minimal guidance. Direct guidance from the investigator was necessary for at least one of the mothers in generating a functionally equivalent behavior or in teaching this behavior. Targeted behavior improved in one child only. Both mothers showed decreases in both parent and child-related stress, though this was at the significant level for only one mother. A father, who was able to participate intermittently, reported increases in both parent and child-related stress. Levels of perceived sense of competency in parenting were within the normal range for both mothers and the father at pre-test and did not increase significantly at post-test. All parents reported that they were either satisfied or highly satisfied with the intervention.