Visuospatial and mathematical dysfunction in major depressive disorder and/or panic disorder: A study of parietal functioning

The parietal cortex is critical for several different cognitive functions, including visuospatial processing and mathematical abilities. There is strong evidence indicating parietal dysfunction in depression. However, it is less clear whether anxiety is associated with parietal dysfunction and whether comorbid depression and anxiety are associated with greater impairment. The present study compared participants with major depression (MDD), panic disorder (PD), comorbid MDD/PD and controls on neuropsychological measures of visuospatial processing, Judgement of Line Orientation (JLO), and mathematical abilities, Wide Range Achievement Test (WRAT) Arithmetic. Only comorbid MDD/PD was associated with decreased performance on JLO, whereas all psychopathological groups exhibited comparably decreased performance on WRAT Arithmetic. Furthermore, the results were not accounted for by other comorbid disorders, medication use or psychopathology severity. The present study suggests comorbid depression and anxious arousal are associated with impairment in visuospatial processing and provides novel evidence indicating mathematical deficits across depression and/or anxiety. Implications for understanding parietal dysfunction in internalising psychopathology are discussed.     

Diagnosticity and prototypicality in category learning: a comparison of inference learning and classification learning

Category knowledge allows for both the determination of category membership and an understanding of what the members of a category are like. Diagnostic information is used to determine category membership; prototypical information reflects the most likely features given category membership. Two experiments examined 2 means of category learning, classification and inference learning, in terms of sensitivity to diagnostic and prototypical information. Classification learners were highly sensitive to diagnostic features but not sensitive to nondiagnostic, but prototypical, features. Inference learners were less sensitive to the diagnostic features than were classification learners and were also sensitive to the nondiagnostic, prototypical, features. Discussion focuses on aspects of the 2 learning tasks that might lead to this differential sensitivity and the implications for learning real-world categories.     

Person-environment congruence in relation to career change and career persistence

This study examined Holland’s theoretical proposition, that personality-work environment congruence influences career stability and change, with a sample of 212 career changers (respondents who expressed an intent to change career and had engaged in preliminary career change activity) and 249 career persisters (respondents who indicated an intent to remain in their current career). Independent groups ANCOVA (controlling for age and current career tenure) indicated that career persisters scored higher on congruence than career changers, however, the effect size was within the small to medium range. Repeated-measures ANCOVA indicated, with a medium effect size, that career changers moved towards careers that were more congruent with their personality profiles than their current careers. Practical and theoretical implications are discussed.     

"In the storminess": multi-disciplinary approaches to scriptural images representing ethical challenges in the pastor-congregant relationship

In this qualitative study the authors examine the Scriptural images that 10 Lutheran pastors employed in describing the ethical challenges in the pastor-congregant relationship. The analysis of Scriptural images is part of a larger study on pastors' experiences of a mandatory workshop, "Crossing the Boundaries (CTB),"which is required of Evangelical Lutheran Church in Canada (ELCIC) seminarians. The pastors' images were analyzed from the four perspectives of depth psychology, theology, social ethics, and sociology. In commenting on tensions in the pastors' Scriptural images the authors note commonalities among the four theoretical perspectives and discuss implications for practice and future research.     

Drug-behavior interaction history: modification of the effects of morphine on punished behavior.

Squirrel monkeys were trained to respond under a multiple fixed-interval, fixed-interval schedule in which the first response after 5 min terminated a visual stimulus in the presence of which electric shocks could occur. During one component of the schedule, correlated with one color of stimulus lights, every 30th response also produced electric shock; responding was suppressed during this component to approximately 10 to 12% of that occurring in the alternate component in which responding was not punished. In contrast to previous research, morphine (0.03 to 1.0 mg/kg) increased punished responding. Unpunished responding, however, was either not affected or decreased at doses of morphine that increased punished responding. Increases in rate of punished responding also occurred when the single-schedule punishment condition was studied alone in these animals. Subsequent experimentation, which systematically analyzed the development of the rate-enhancing effects of morphine on punished responding, involved the study of drug effects in additional monkeys trained initially under a single-schedule punishment condition. The effects of morphine on punished responding were studied before, after, and then during exposure to the multiple schedule that included a component in which responding was not punished. Increases in response rate with morphine did not occur until it was administered during exposure to the multiple schedule that included a component in which responding was not punished. As with the other monkeys, once the rate increases in punished responding occurred under the multiple schedule, these effects of morphine persisted, even when the multiple schedule was removed.(ABSTRACT TRUNCATED AT 250 WORDS)     

Prevalence of ADHD and comorbid disorders among elementary school children screened for disruptive behavior

In the context of a school-based prevention of conduct disorder program, 7,231 first- through fourth-grade children were screened for cross-setting disruptive behavior. Frequencies of DSM-III-R psychiatric disorders and patterns of comorbidity were assessed. We also examined the association of psychiatric diagnosis with child and parent characteristics to determine differential risk based on diagnostic subgroups. Attention deficit hyperactivity disorder (ADHD) and oppositional-defiant disorder (ODD) were the most frequent diagnoses. Mood and anxiety disorders were infrequent as single diagnoses. Patterns of comorbidity demonstrated that both externalizing and internalizing disorders commonly cooccurred with ADHD. More severe degrees of psychopathology and psychosocial risk accrued to the subgroup of youths with ADHD plus a comorbid externalizing disorder.This study was supported by grant MN-46584 from the National Institute of Mental Health.     

J. M. Keynes' ‘theory of evidential weight’: Its relation to information processing theory and application in The General Theory

The conclusions derived by Keynes in his Treatise on Probability (1921) concerning induction, analogical reasoning, expectations formation and decision making, mirror and foreshadow the main conclusions of cognitive science and psychology.The problem of weight is studied within an economic context by examining the role it played in Keynes' applied philosophy work, The General Theory (1936). Keynes' approach is then reformulated as an optimal control approach to dealing with changes in information evaluation over time. Based on this analysis the problem of inductive justification, from a societal perspective, is not, What can we rationally believe will occur in the economic future, given our past experiences? but Can we make the future so as to attain specific economic goals with practical certainty? An answer requires that restrictions be placed on the methodological individualist approach and the acceptance of a restricted holistic approach.     

Frequency and duration of hierarchy item exposure in a systematic desensitization analogue

Little is known regarding the importance of stimulus presentation variables in desensitization. A repeated measures factorial research design was utilized to investigate the role of hierarchy item frequency and duration in a desensitization analogue. Two frequency levels (1 and 3) and three total duration levels (3,12 and 30 sec) were combined to form six treatment groups; an additional no-treatment control group was also used. Results in both overt behavioral and subjective fear response modes suggest that single exposures are preferable, but that this preference is localized primarily in the longer total duration range. Long single exposures to hierarchy items yielded the greatest and most persistent changes in both response modes. It is suggested that clinicians utilize item presentations of this sort to determine their efficacy in actual therapy conditions. Choice of technique for assessing change and the utility of analogue studies are also briefly discussed.