Minnesota Multiphasic Personality Inventory (MMPI) profiles from 123 chronic headache sufferers (48 migraine, 47 muscle contraction, 28 mixed) were cluster analyzed in order to replicate results from other pain populations and to examine differences among the clusters along headache parameters and demographic variables. Four homogeneous subgroups were obtained and a multiple discriminant analysis was successful in correctly classifying 97.56% of the headache subjects. Obtained clusters closely resembled those evidenced in previous pain research. Results indicated that diagnostic category was unrelated to cluster membership; however, frequency of headache occurrence was a differentiating factor. Implications for headache treatment and future research are discussed.

Recently, Investigations have examined the possible link between the Type A Behavior Pattern (TABP) and chronic headache. Several studies have Indicated a significant relation between Type A, as measured by the Jenkins Activity Survey (JAS), and headache frequency. As well, several researchers have noted the similarities In the descriptions of the Type A Individual and those characteristics of the "migraine personality." To date, no prospective study has examined whether that set of characteristics ascribed to mlgraineurs Is in fact the TABP. The second focus of this investigation was to provide a comprehensive description of the psychological functioning of Type A and B headache sufferers across several domains: psychopathology, social functioning, health beliefs and behaviors, and daily stress monitoring. Sixty chronic headache sufferers (30 tension. 30 migraine) volunteered as subjects for this investigation. Participants provided full headache histories and were diagnosed by both a doctoral candidate in clinical psychology and a neurologist according to Ad Hoc Committee criteria. All participants kept headache diaries for eight weeks and V

The factor structure of the Wechsler Adult Intelligence Scale‐Revised (WAIS‐R) for a large sample of incarcerated individuals (N = 234) was investigated. A principal components analysis followed by Varimax rotation identified the familiar Perceptual Organization and Verbal Comprehension factors. Coefficients of congruence between the current factors and those of the WAIS‐R standardization sample indicate a high degree of correspondence. Thus, empirical support was provided for interpretation of WAIS‐R Performance and Verbal IQs in this population.

Comparison of intellectual functioning across racial groups is an important scientific issue with broad interdisciplinary implications. A large random sample (N = 275) of Black and White incarcerated individuals were studied to evaluate the topography of intelligence across race. Principal factor analyses yielded the general intelligence-g factor along with specific Verbal Comprehension and Perceptual Organization dimensions. All three of these structural components were highly congruent between Whites and Blacks. Theoretical implications of these data include: (1) evidence of qualitatively equivalent intellectual functioning across race, (2) justification of a verbal-performance dichotomy of adult intelligence across racial groups, and (3) support for construct validity of adult intellectual assessment across race.

Though the issue of test bias has gained wide-spread publicity, the results of studies investigating the effects of the examiner's race on the scoring of responses from minority children remain equivocal. The present study was intended to investigate the effects of white examiners' prejudice levels on their scoring of ambiguous WISC-R responses from both white and Hispanic children. Participants, previously screened for prejudice level, were trained to score three sub-tests of the WISC-R. From these subtests, 55 ambiguous responses were recorded twice on audiotape in a mock assessment; in one condition, the responses were made by a Caucasian voice, in the other, by a Hispanic voice. The results showed that white “examiners” do not score Hispanic and white children's responses differently. This demonstrates, for the first time, that examiner prejudice levels in combination with examinee racial background account for little, if any, of the variance of scores obtained with the WISC-R.