Exact results related to the periodic Anderson model in D » 1 dimensions

We present exact results related to the T = 0 phase diagram of the periodic Anderson model in the strong coupling U =infinity limit for D = 2,3 dimensions. In a restricted parameter region, a ground state with simple algebraic structure was deduced in both dimensions, and its region of existence was characterized by sufficient conditions. The quasiparticle creation operator that builds up the ground state wave function does not satisfy the standard fermionic anticommutation relations.     

Hardiness Promotes Work Engagement,Prevents Burnout,and Moderates Their Relationship

We examined the relationships between hardiness, work engagement, and burnout. Participants were Belgian service members involved in the International Security and Assistance Force (ISAF) operation. They completed a questionnaire containing hardiness items from the revised Norwegian Hardiness Scale, items concerning vigor and dedication from the Utrecht Work Engagement Scale, and those tapping cynicism and emotional exhaustion from the Utrecht Burnout Scale. Results showed that hardiness was positively related to dedication and vigor, and negatively to cynicism and emotional exhaustion. Our results further suggest that work engagement and burnout are the opposite ends of a continuum. However, analyses concerning the moderation effect of hardiness suggest that individual differences could imply different processes in the relationship between work engagement and burnout.     

Millon Behavioral Medicine Diagnostic (MBMD) Predicts Health-Related Quality of Life (HrQoL) Over Time Among Men Treated for Localized Prostate Cancer

Prostate cancer treatment presents multiple challenges that can negatively affect health-related quality of life (HrQoL), and that can be further compromised by maladaptive personality styles and psychological adjustment difficulties. This study examined the utility of a comprehensive psychosocial screening tool to identify psychosocial traits that prospectively predict HrQoL status among men treated for localized prostate cancer. The Millon Behavioral Medicine Diagnostic (MBMD) was administered to 66 men (M age = 68 years, 59% White) treated by either radical prostatectomy or radiotherapy along with standard measures of general and prostate-cancer-specific quality of life assessed at a 12-month follow-up. Higher scores on both summary MBMD Management Guides (Adjustment Difficulties and Psych Referral) and higher scores on personality styles characterized by avoidance, dependency, depression, passive aggressiveness, and self-denigration predicted lower HrQoL (β range = –.21 to –.50). Additionally, higher scores on the MBMD Depression, Tension-Anxiety, and Future Pessimism scales predicted lower HrQoL. Finally, higher scores on the MBMD Intervention Fragility and Utilization Excess scale also consistently predicted poorer mental and physical health functioning over time. These results point to the utility of the MBMD to help screen for potential impairments in mental and physical health functioning in men undergoing treatment for prostate cancer.     

Likelihood of suicidality at varying levels of depression severity: a re-analysis of NESARC data

Although it is clear that increasing depression severity is associated with more risk for suicidality, less is known about at what levels of depression severity the risk for different suicide symptoms increases. We used item response theory to estimate the likelihood of endorsing suicide symptoms across levels of depression severity in an epidemiological data set. Regardless of depression severity, suicide attempts were less frequently endorsed than ideation, which was less frequently endorsed than feeling like one wanted to die. All suicide symptoms were generally less likely to be endorsed than other depression symptoms. There was a low probability of suicidality at depression levels that likely would not merit a diagnosis of major depression.     

Disentangling the Effects of Applicant Defensive Impression Management Tactics in Job Interviews

This study explores (1) the effects that three kinds of applicant defensive impression management (IM) tactics (apologies, justifications, and excuses) have on interviewer evaluation and (2) the moderating effects that two types of interviewer negative concerns (competence‐related and integrity‐related concerns) have on the aforementioned relationship. Two hundred and one managers from Taiwan participated in this study by watching a simulated interview. Compared with the control group, applicants using defensive IM tactics received higher interviewer ratings when negative concerns surfaced. Moreover, the type of interviewer negative concern moderated the effects of defensive IM tactics. All three tactics had similar effects on interviewer evaluation when the concern was competence related. Apology was, however, the most effective tactic when the concern was integrity related.     

The Validity of Assessment Centres for the Prediction of Supervisory Performance Ratings: A meta‐analysis

The current meta‐analysis of the selection validity of assessment centres aims to update an earlier meta‐analysis of assessment centre validity. To this end, we retrieved 26 studies and 27 validity coefficients (N=5850) relating the Overall Assessment Rating (OAR) to supervisory performance ratings. The current study obtained a corrected correlation of .28 between the OAR and supervisory job performance ratings (95% confidence interval .24≤ρ≤.32). It is further suggested that this validity estimate is likely to be conservative given that assessment centre validities tend to be affected by indirect range restriction.     

Dissociation of processing time and awareness by the inattentional blindness paradigm

Consciousness researchers are interested in distinguishing between mental activity that occurs with and without awareness (i.e., explicit versus implicit processes). The inattentional blindness (IB) paradigm is an excellent tool for this question because it permits the independent manipulation of processing time and awareness. In the present study, we show that implicit texture segregation can occur during inattentional blindness, provided that the texture is exposed for a sufficient duration. In contrast, a Simon effect does not occur during inattentional blindness, even with similar exposure duration of the critical stimulus. This reveals a dissociation between processing time and awareness, consistent with the possibility of separate processing streams for explicit and implicit visual perception.     

Effects of dehydroepiandrosterone sulfate and progesterone on spatial learning and memory in young and aged mice

Young (2-4 months) and aged (14-16 months) male Swiss-Webster albino mice (n = 7 per group) were subcutaneously injected with 20 mg/kg/day dehydroepiandrosterone sulfate (DHEAS), progesterone (P), DHEAS + P, or vehicle control and trained over a 5-day period in a Morris water maze. The subjects were tested 48 hr after training for memory recall as measured by latencies to locate the hidden platform, and trunk blood was collected immediately thereafter. As expected, latency to platform decreased for all groups over the 6 testing days, with aged mice taking longer to reach platform than did young mice. However, results did not support the hypotheses that DHEAS-treated mice would exhibit shorter latencies and that P-treated mice would show longer latencies to platform in comparison with age-matched controls. These results raise doubts about the effectiveness of commercially available supplements claiming to promote enhanced memory in humans.     

Hindsight bias in insight and mathematical problem solving: Evidence of different reconstruction mechanisms for metacognitive versus situational judgments

This article presents two experiments that used insight and mathematical problems to investigate whether different factors would affect hindsight bias on metacognitive and situational judgments. In both studies, participants initially rated their likelihood of solving each problem within a certain amount of time (metacognitive judgments) and rated the importance of each component of the problem for finding the solution (situational judgments). Next, participants attempted to solve each problem. In Experiment 1, all participants were given solution feedback information, but in Experiment 2, participants were not given any solution feedback. After 1 week, participants were asked to recall their original judgments. Hindsight bias was assessed by comparing the initial with the final ratings. Insight problems and math problems showed different patterns of hindsight bias effects on the metacognitive and situational judgments. The results suggest that two competing models of hindsight effects are actually complementary explanations for judgment reconstruction on different types of judgment tasks.