Parent Attitude Research Instrument (PARI): clinical vs. statistical inferences in understanding abusive mothers

Attitudes toward child rearing and early experiences in childhood traditionally have been regarded as psychodynamic factors that influence adult behavior. The present study assessed the capacity of the Parent Attitude Research Instrument (PARI) to differentiate between court-identified abusive mothers and a control sample of nonabusive, well-baby clinic mothers of comparable socioeconomic status. While univariate t-tests showed statistical significance for 3 of the 23 PARI scales, more sophisticated and appropriate multivariate tests (Discriminant Function Analysis) demonstrated that the PARI correctly classified the experimental and control Ss only 65% of the time. It appears that the PARI alone should not be used to identify potentially abusive mothers. Even more important, the results caution and alert non-statistically informed clinicians and researchers to the pitfall of over-interpreting clinical data that are based on the more simple univariate tests of statistical significance.