Metatraits: Enhancing Criterion‐Related Validity Through the Assessment of Traitedness1

With the growing use of personality tests as predictors of job performance, the reliable measurement of these personality variables has become important to selection researchers and practitioners. Metatrait researchers have examined the possibility that personality traits are not equally relevant for all people. This study sought to examine whether considering the relevance of a trait to an individual (i.e., traitedness) would enhance the predictive validity of a measure. Specifically, traitedness was expected to moderate the relationship between predictor and criterion scores such that the predictor‐criterion relationship would be stronger for traited than for untraited individuals. Consistent with this hypothesis, a strong moderating effect was found for traitedness between a measure of personality and an objective criterion. Contrary to what was predicted, traitedness only provided incremental validity, above personality, for supervisor ratings of job performance.     

Motor learning-dependent synaptogenesis is localized to functionally reorganized motor cortex.

The regional specificity and functional significance of learning-dependent synaptogenesis within physiologically defined regions of the adult motor cortex are described. In comparison to rats in a motor activity control group, rats trained on a skilled reaching task exhibited an areal expansion of wrist and digit movement representations within the motor cortex. No expansion of hindlimb representations was seen. This functional reorganization was restricted to the caudal forelimb area, as no differences in the topography of movement representations were observed within the rostral forelimb area. Paralleling the physiological changes, trained animals also had significantly more synapses per neuron than controls within layer V of the caudal forelimb area. No differences in the number of synapses per neuron were found in either the rostral forelimb or hindlimb areas. This is the first demonstration of the co-occurrence of functional and structural plasticity within the same cortical regions and provides strong evidence that synapse formation may play a role in supporting learning-dependent changes in cortical function.     

Exploring links between polychronicity and well-being from the perspective of person–job fit: Does it matter if you prefer to do only one thing at a time?

This research examined polychronicity, which refers to an individual’s preference for working on many things simultaneously as opposed to one at a time. It was hypothesized that supplies–values fit on this temporal variable is related to well-being. Specifically, it was predicted that deficient and excess polychronicity supplies are associated with poorer well-being, and that well-being is uniformly high along the continuum of polychronicity fit. It was also hypothesized that fit effects are stronger for individuals who place high importance on how their time is allocated than for individuals who place low importance on that dimension. Participants in Study 1, a laboratory experiment, were students (N = 266); participants in Study 2, conducted in a field setting, were employees of Canadian organizations (N = 746). No fit effects were observed in Study 1. Consistent with the hypotheses, however, fit on the dimension of polychronicity was related to job satisfaction, self-efficacy, and psychological strain in Study 2. The role of value importance as a moderator of the relation between supplies–values fit and well-being was not supported.     

Perceptual processing of partially and fully assimilated words in French

Models of speech perception attribute a different role to contextual information in the processing of assimilated speech. This study concerned perceptual processing of regressive voice assimilation in French. This phonological variation is asymmetric in that assimilation is partial for voiced stops and nearly complete for voiceless stops. Two auditory-visual cross-modal form priming experiments were used to examine perceptual compensation for assimilation in French words with voiceless versus voiced stop offsets. The results show that, for the former segments, assimilating context enhances underlying form recovery, whereas it does not for the latter. These results suggest that two sources of information -- contextual information and bottom-up information from the assimilated forms themselves -- are complementary and both come into play during the processing of fully or partially assimilated word forms.     

Initial examination of the validity and reliability of the female photographic figure rating scale for body image assessment

The present study reports on the reliability and validity of an improved body image assessment scale, namely the female Photographic Figure Rating Scale (PFRS). This scale consists of ten photographic images of real women varying in body mass index (BMI) from emaciated to obese. The PFRS was designed to overcome many of the limitations associated with line-drawn figures that are currently in use, including a lack of realism and poor ecological validity. Based on a sample of 208 adult women, the results of the present study showed that the PFRS had good validity in that all images were correctly rank-ordered by BMI. In addition, construct validity was supported by the finding that current self-ratings of body size based on the PFRS were significantly correlated with participants’ BMI and that body dissatisfaction was negatively correlated with positive body image. Finally, test–retest reliabilities showed that the PFRS remained stable after a three-week interval. The discussion focuses on the strengths and limitations of the PFRS in relation to existing scales used in body image assessment.     

Upward spirals of positive emotion and coping: Replication, extension, and initial exploration of neurochemical substrates

The broaden-and-build theory (Fredrickson, 1998, 2001) predicts that positive emotions broaden the scopes of attention and cognition, thereby facilitating the building of personal resources and initiating upward spirals toward increasing emotional well-being. This study attempts to replicate and extend previous empirical support for this model. Using a sample of 185 undergraduates, we assessed whether positive affect and broad-minded coping, interpersonal trust, and social support reciprocally and prospectively predict one another over a two-month period, and whether this upward spiral might be partially based in changes in dopaminergic functioning. As hypothesized, PA and positive coping did mutually build on one another, as did PA and interpersonal trust. Contrary to expectation, PA did not demonstrate an upward spiral relation with social support. Results suggest further study of the relationship between PA and changes in dopamine metabolite levels over time is warranted.