Performance differences among four organizational commitment profiles

The authors drew from prior research on organizational commitment and from configural organizational theory to propose a framework of affective and continuance commitment profiles. Using cluster analyses, the authors obtained evidence for 4 of these profiles in an energy industry sample (N=970) and a sample of 345 employed college students. The authors labeled the clusters: allied (i.e., moderate affective and continuance commitment), free agents (moderate continuance commitment and low affective commitment), devoted (high affective and continuance commitment), and complacent (moderate affective and low continuance commitment). Using a subset of the employed student sample (n=148), the authors also found that the free agents received significantly poorer supervisor ratings of performance, organizational citizenship behavior, and antisocial behavior than any other group.     

Cognitive Fatigue During Testing: An Examination of Trait,Time-on-Task,and Strategy Influences

Two-wave data from a large sample of employees (N = 1,155) 25–65 years of age were used to evaluate rank-order and mean level stability and change in supervisor-rated job performance obtained twice (4 years apart). Results showed moderated levels of rank-order stability across the career span. However, although rank order stability increased during the first phases of one’s career, peaking at age 55, it then demonstrated a decline from age 55 to age 65. Patterns of mean-level change showed that job performance was generally higher for younger workers than for older workers. All in all, our results support the value of investigating different definitions of job performance change and offers insights for planning/programming and implementing interventions aimed to improve (or maintain) job performance.     

Identifying reading strategies using latent semantic analysis: Comparing semantic benchmarks

We explored methods of using latent semantic analysis (LSA) to identify reading strategies in students’ self-explanations that are collected as part of a Web-based reading trainer. In this study, college students self-explained scientific texts, one sentence at a time. LSA was used to measure the similarity between the self-explanations andsemantic benchmarks (groups of words and sentences that together represent reading strategies). Three types of semantic benchmarks were compared: content words, exemplars, and strategies. Discriminant analyses were used to classify global and specific reading strategies using the LSA cosines. All benchmarks contributed to the classification of general reading strategies, but the exemplars did the best in distinguishing subtle semantic differences between reading strategies. Pragmatic and theoretical concerns of using LSA are discussed.     

Restraint stress and corticotropin releasing hormone modulation of murine cutaneous POMC mRNA

The skin is a unique immunological defense barrier that protects the organism from occupational and environmental exposures and provides a model system in which to evaluate the interaction of the central nervous system with the peripheral immune response. In the studies presented here, we tested mild, acute restraint stress activation of the cutaneous corticotropin releasing hormone-pro-opiomelanocortin (CRH-POMC) axis. We verified that 2 h restraint stress increased the serum concentration of corticosterone and alpha-melanocyte stimulating hormone. We report for the first time that CRH upregulates POMC mRNA expression in mouse skin in vitro. We also demonstrated, by RT-PCR, that 2,4 di-nitrofluorobenzene (DNFB) upregulates cutaneous POMC mRNA expression, the production of which is suppressed by restraint stress. These data confirm the presence and functionality of two hormones of the hypothalamo-pituitary axis in the skin and suggest that activation of the central hypothalamo-pituitary-adrenal axis may over ride activation of the cutaneous CRH-POMC mechanism in the development of DNFB-stimulated allergic contact dermatitis.