included in the study, the children in the comparison group could not meet diagnostic criteria for Oppositional Defiant Disorder.
The two groups were compared on several measures including the Parenting Stress Index (PSI), the Parental Locus of Control Scale Short Form (PLOC-SF), the Eyberg Child Behavior Inventory (ECBI), and the DPICS II behavior observations. Videotapes of the father-child dyads were coded by observers trained to use the DPICS II. The primary coders were blind to the hypotheses of this study. Thirty percent of the videotapes for each group, randomly selected, were re-coded to evaluate reliability. Reliability was assessed using intraclass correlations and Cohen's kappa. Overall, the DPICS II categories were shown to have acceptable reliability estimates. Significant differences between groups were found on DPICS II variables, providing evidence for the discriminative validity of the coding system. Furthermore, the DPICS II demonstrated convergent validity by correlating significantly with scores on the ECBI, the PLOC-SF, and the parent and child scales of the PSI. Recommendations for improving DPICS II are discussed.
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