Objective: The Psychopathy Checklist-Revised (PCL-R; Hare, 1991, 2003) is often used to assess risk of violence, perhaps based on the assumption that it captures emotionally detached individuals who are driven to prey upon others. This study is designed to assess the relation between (a) core interpersonal and affective traits of psychopathy and…

Treatment integrity refers to implementing interventions as intended. Treatment integrity is critically important for experimental validity and for drawing valid inferences regarding the relationship between treatment and outcome. Yet, it is rarely adequately addressed in psychotherapy research. The authors examined barriers to treatment integrity…

Objective: To support ongoing monitoring of child response during treatment, we sought to develop a brief, easily administered, clinically relevant, and psychometrically sound measure. Method: We first developed child and caregiver forms of a 12-item Brief Problem Checklist (BPC) interview by applying item response theory and factor analysis to…

Describes hypothesis validity as extent to which research results reflect theoretically derived predictions about relations between or among constructs. Discusses role of hypotheses in theory testing. Presents four threats to hypothesis validity: (1) inconsequential research hypotheses; (2) ambiguous research hypotheses; (3) noncongruence of…

Problem-child families and normal families were classified using the dyadic parent-child interaction coding system (DPICS). The DPICS was found to be a reliable, clinically practical research instrument that correctly classified 94 percent of the families and predicted 64 percent of the variance in parent report of home behavior problems. (Author)

Examined seven-year adolescent panel to determine whether attrition effects varied by type of substance assessed and method of measurement. Found study dropouts were more likely to use substances and reported higher mean use of substances at baseline than stayers; attrition effects varied by substance; and mean use comparisons were more likely to…

Compared alprazolam, imipramine, and placebo in the treatment of panic disorder patients (n=59) to investigate concerns about the internal validity of the double-blind design. Found that the great majority of patients and physicians were able to rate accurately whether active drug or placebo had been given and physicians could distinguish between…

The choice of the clustering method, the similarity measure, the computer program, and the procedure for estimating the number of clusters should be clearly specified in any journal article using cluster analysis. Adequate evidence of a cluster solution's validity should be provided before the solution is published. (Author)

Explores the issues of patient homogeneity, external validity, internal validity, choosing and implementing specific treatment modalities, therapist experience and attitudes, therapist age, reliability and validity of measures, and problems obtaining follow-up information when studying treatment of depressed elderly patients. (Author)

Evaluation of the clinical significance of a depression treatment program revealed that a substantial number of clients made reliable improvements; posttreatment scores fell within a functional distribution. Results suggest that highly structured interventions for outpatients with major depression can instill clinically meaningful changes in short…