The validity of vigilance tasks in differential diagnosis of children referred for attention and learning problems

This study was conducted to evaluate the convergent and discriminant validity of vigilance measures of attention and impulsivity in children. One hundred children referred for evaluation of attention and learning problems were administered a battery of tests including two vigilance tasks, other laboratory measures of inattention and impulsivity, and parent and teacher ratings. It was predicted that vigilance task performance would correlate with teacher ratings and laboratory measures of inattention while correlations with ratings of aggressive behavior were predicted to be lower. Moderate correlations were obtained between the vigilance task scores and other laboratory measures of inattention and impulsivity. However, the vigilance scores did not correlate with teacher or parent ratings of behavior. A factor analysis, conducted to identify underlying dimensions of attention in the battery of tests, revealed strong source effects. The implications for use of vigilance measures in diagnosis are discussed.Portions of this paper were presented at the 1990 Learning Disabilities Association of America International Conference, Anaheim, California.     

Family Therapy With Irish-Americans

This paper presents a paradigm for understanding the cultural values and family patterns of Irish-American families and offers suggestions for clinical intervention. Families' correspondence to the model described will depend upon their level of acculturation, socioeconomic status, and other contextual factors. The paradigm suggests a number of issues that may create difficulties for the therapist and for the family in therapy. In general, behavioral techniques, Bowen systems therapy, and strategic interventions may be more useful than techniques emphasizing expression of emotions in therapy or direct attempts to alter communication or family behavior in therapy sessions, as used in structural therapy.     

MEASUREMENT ERROR IN RESEARCH ON HUMAN RESOURCES and FIRM PERFORMANCE: HOW MUCH ERROR IS THERE AND HOW DOES IT INFLUENCE EFFECT SIZE ESTIMATES?

Studies of the relationship between human resource (HR) practices and firm performance typically use a single respondent to assess firm level HR practices or HR effectiveness. However, previous research in other substantive areas suggests that rater differences are a potentially important source of measurement error. We demonstrate analytically the potential consequences of both random and systematic measurement error in research on HR and firm performance. However, our main focus is on random error and we show how generalizability theory can be applied to obtain better estimates of reliability by simultaneously recognizing multiple sources (e.g., items, raters) of random measurement error. These more inclusive reliability estimates, in turn, offer the possibility of more precisely quantifying substantive relationships in the HR and firm performance literature. In our sample, reliabilities (as estimated by generalizability coefficients) for single-rater assessments of HR variables were generally below .50. This degree of measurement error, if present in substantive studies on HR and firm performance, could lead to considerable bias, given that an unstandardized regression coefficient is corrected for measurement error in the independent variable by dividing by its reliability coefficient (not its square root). We also found only limited convergent validity between HR and line managers ratings of a second type of HR measure, HR effectiveness. In general, our findings suggest that future researchers need to devote greater attention to measurement error and construct validity issues. Our study provides an example of how generalizability theory can be useful in this pursuit.     

Perceptions of Suicide Risk and the Helpfulness of Intervention Strategies: A Comparison of Students and Mothers

College students (n = 132) and mothers (n = 64) listened to simulated hotline calls and rated level of suicide risk and the helpfulness of interventions. Students also rated their intent to take action in a similar situation; mothers rated their child's intent to take action. Students, more than mothers, perceived emotional problems to be associated with risk; mothers, more than students, perceived changes in behavior to be associated with risk. Students and mothers generally agreed regarding the helpfulness of different interventions, rating talking as most helpful. However, students, more than mothers, perceived social distraction as helpful. Mothers were generally accurate in their perceptions of their children's intended actions. Results suggest the need for additional research on the skills adolescents bring to crisis situations.