Dimensional versus categorical classification of mental disorders in the fifth edition of the Diagnostic and Statistical Manual of Mental Disorders and beyond: comment on the special section

The value of including dimensional elements in the Diagnostic and Statistical Manual of Mental Disorders (DSM) has been recognized for decades. Nevertheless, no proposals have been made for introducing dimensional classification in the diagnostic system in a valid and feasible manner. As an initial step in this endeavor, the authors suggest introducing dimensional severity ratings to the extant diagnostic categories and criteria sets. Although not without difficulties, this would begin to determine the feasibility of dimensional classification and would address some limitations of the purely categorical approach (e.g., failure to capture individual differences in disorder severity, and clinically significant features subsumed by other disorders or falling below conventional DSM thresholds). The utility of incorporating broader dimensions of temperament and personality in diagnostic systems beyond the fifth edition of the DSM is also discussed.     

Core self-evaluations and job and life satisfaction: the role of self-concordance and goal attainment

The present study tested a model explaining how the core self-evaluations (i.e., positive self-regard) concept is linked to job and life satisfaction. The self-concordance model, which focuses on motives underlying goal pursuit, was used as an explanatory framework. Data were collected from 2 samples: (a) 183 university students (longitudinal measures of goal attainment and life satisfaction were used) and (b) 251 employees (longitudinal measures of goal attainment and job satisfaction were utilized). In both studies, the core self-evaluations concept was positively related to goal self-concordance, meaning that individuals with positive self-regard were more likely to pursue goals for intrinsic and identified (value-congruent) reasons. Furthermore, in both studies, goal self-concordance was related to satisfaction (job satisfaction in Study 1 and life satisfaction in Study 2).     

The role of affect in determining the attributional weight of immoral behaviors

Theories about why immoral behaviors carry a large amount of attributional weight tend to emphasize traditional cognitive variables. In contrast, the authors propose that the degree of negative affect that these behaviors induce in observers is largely responsible for their attributional weight. Studies 1 and 2 demonstrate an association between the amount of negative affect induced by immoral behaviors and their attributional weight. Studies 3 and 4 provide causal evidence for this idea by either "adding in" or "taking away" the negative affect associated with immoral behaviors to influence their attributional weight. Finally, Study 5 demonstrates that negative affect can be induced through a variety of negative emotions (disgust, sadness, and fear), with similar results. It is argued that it is difficult to account for these data solely on the basis of traditional cognitive variables, and so a theory that includes an emphasis on affect as a causal variable is desirable.     

Multivariate modeling of age and retest in longitudinal studies of cognitive abilities

Longitudinal multivariate mixed models were used to examine the correlates of change between memory and processing speed and the contribution of age and retest to such change correlates. Various age- and occasion-mixed models were fitted to 2 longitudinal data sets of adult individuals (N>1,200). For both data sets, the results indicated that the correlation between the age slopes of memory and processing speed decreased when retest effects were included in the model. If retest effects existed in the data but were not modeled, the correlation between the age slopes was positively biased. The authors suggest that although the changes in memory and processing speed may be correlated over time, age alone does not capture such a covariation.     

Borderline personality disorder features and utilization of treatment over two years

This study assessed the relationship between borderline personality disorder (BPD) features and treatment utilization over a 2-year time period. Participants included 349 18-year-old nonclinical young adults, approximately one-half of whom endorsed significant borderline features. The laboratory phase of the study involved the administration of self-report and interview-based assessments of BPD psychopathology at Wave 1, as well as interviews targeting Axis I psychopathology and treatment utilization history at Wave 2 (2 years later). Results indicated that borderline features prospectively predicted utilization of psychopharmacological treatment above and beyond what was accounted for by gender, lifetime Axis I psychopathology, and nonBPD Axis II psychopathology. The borderline feature most strongly associated with treatment utilization was affective instability.     

The effects of local and global processing demands on perception and action

The line-bisection task, adapted to utilise a wooden rod as the bisection stimulus, has revealed that patients with visuo-spatial neglect may be more accurate at bisection when asked to pick up the rod, compared to pointing to its centre. We recently reported that neurologically intact participants show a similar dissociation on this task-demonstrating a rightward bias when pointing to the centre, which was not present when grasping the rod by the centre. The current paper examined how pointing and grasping responses were affected by adapted rod-bisection tasks that emphasised local or global processing. In Experiment 1, 26 participants completed four rod-bisection tasks. The rods were compound stimuli and the participants directed to focus on either the local or global level. The results demonstrated that when participants focused on the global level, the previous dissociations found for pointing and grasping conditions were evident. However, the perception of centre did change when participants focused on the local level: both the pointing and grasping responses were rightward biased. In Experiment 2, 42 participants completed three bisection tasks which again emphasised either the local or global level, but in different sets of stimuli. The results of this task further support the findings in Experiment 1: the rightward bias in the local-bisection task was again evident and in addition, the global-bisection task resulted in no bias and no difference between the pointing and grasping bisections. These results demonstrate how task demands can similarly affect the pointing and grasping responses, and indicate that local and global processing may be involved in perception/action dissociations on rod bisection.     

The least likely of times: how remembering the past biases forecasts of the future

Atypical events are both memorable and unrepresentative of their class. We tested the hypotheses that (a) people tend to recall atypical instances of events, and (b) when they are unaware of this, they rely on these atypical instances in forecasting their affective reactions to future events. In three studies, participants who were asked to recall an instance of an event and participants who were asked to recall an atypical instance of an event recalled equally atypical instances. However, only the former participants made extreme forecasts about their reactions to future events. The results suggest that the impact bias (the tendency to overestimate the affective impact of future events) may be due in part to people's reliance on highly available but unrepresentative memories of the past.     

A psychometric approach to intuitive physics

The literature on intuitive physics shows that many people exhibit systematic errors when predicting the behavior of simple physical events. Most previous research has attributed these errors to factors specific to a certain class of tasks. In the present study, we investigated the possibility that intuitive physics performance may be related to general measures of cognitive ability. Two hundred four adults (ages, 20-91 years) were presented with five pairs of intuitive physics questions. It was found that performance on the intuitive physics items was moderately intercorrelated, suggesting that they were tapping into a unitary construct. Despite the correlation with factors that decline with advancing age, intuitive physics performance was not correlated with age (r= .00). The findings are discussed in the context of research on intuitive physics, as well as research on cognitive aging.     

Effects of processing bias on the recognition of composite face halves

Research has shown that face recognition accuracy can be improved by prior global processing and impaired by prior local processing (Macrae & Lewis, 2002). The aim of this study was to test the processing bias account of face recognition, using the composite face task (Young, Hellawell, & Hay, 1987), a test of featural recognition. Undergraduate volunteers (N=75) participated in a between-subjects design that tested their ability to recognize face halves within a composite, following either global or local Navon processing or a control task. Results showed that, as compared with the control task, local processing speeded ability to recognize face halves. These results provide support for the processing bias account of face recognition.     

Schizophrenia and the experience of intersubjectivity as threat

Many with schizophrenia find social interactions a profound and terrifying threat to their sense of self. To better understand this we draw upon dialogical models of the self that suggest that those with schizophrenia have difficulty sustaining dialogues among diverse aspects of self. Because interpersonal exchanges solicit and evoke movement among diverse aspects of self, many with schizophrenia may consequently find those exchanges overwhelming, resulting in despair, the sensation of fusion with another, and/or self-dissolution. In short, compromised dialogical capacities may be a contributing factor to social dysfunction in schizophrenia.