Acute psychiatric inpatients (N = 451) in a state hospital were given the Symptom Checklist-90 (SCL-90) as part of the routine admission procedures. Previous factor analytic research with the SCL-90 had focused primarily on outpatients. Principal component factor analysis resulted in nine factors that differ somewhat from factors found in previous research with psychiatric outpatients. Eight of the nine factors were found to be reliable using coefficient alpha. Explanations for differences in factor structure between outpatients and inpatients had to do with differing degrees and kinds of symptoms. One implication of these results is that making judgments about symptom patterns of psychiatric inpatients based on outpatient data is questionable. Future directions of research are suggested.
92 students in an upper level college statistics course were given a number of mathematics anxiety and performance measures. A canonical analysis resulted in one significant canonical factor, labeled Mathematics Efficiency, which explains the relationship between mathematics anxiety and mathematics performance. Variables making the greatest contribution to this high math efficiency factor were mathematics anxiety and attitude toward mathematics. One major implication of these results is that psychologists need to focus on attitude change and anxiety reduction techniques in helping people improve their performance in mathematics. In addition, educators need to design curricula which emphasize the promotion of positive attitudes toward mathematics rather than content alone to facilitate mathematics efficiency.
A sample of 80 male offenders charged with premeditated murder were divided into five personality types using MMPI scores. A hierarchical clustering procedure was used with a subsequent internal cross-validation analysis using a second sample of 80 premeditated murderers. A Discriminant Analysis resulted in a 96.25% correct classification of subjects from the second sample into the five types. Clinical data from a mental status interview schedule supported the external validity of these types. There were significant differences among the five types in hallucinations, disorientation, hostility, depression, and paranoid thinking. Both similarities and differences of the present typology with prior research was discussed. Additional research questions were suggested.
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