Free-Variable Tableaux for Propositional Modal Logics

Free-variable semantic tableaux are a well-established technique for first-order theorem proving where free variables act as a meta-linguistic device for tracking the eigenvariables used during proof search. We present the theoretical foundations to extend this technique to propositional modal logics, including non-trivial rigorous proofs of soundness and completeness, and also present various techniques that improve the efficiency of the basic naive method for such tableaux.     

Fidélité inter juge d’une mesure du stress par échelle visuelle analogique

The use of a visual analogue scale (VAS) for the assessment of stress during occupational health examination could be an useful tool. However, psychometrics features of the VAS have to be assessed. The aim of this study is to test the inter judge reliability of the VAS in a psychological dimension assessment. Two occupational physician have used the VAS in a worker group. There is no significant difference in the distribution of VAS values. This result supports the hypothesis of a satisfactory inter judge reliability of the VAS in stress measurement.     

INTRAORGANIZATIONAL EMPLOYEE NAVIGATION AND SOCIALLY DERIVED OUTCOMES: CONCEPTUALIZATION,VALIDATION, AND EFFECTS ON OVERALL PERFORMANCE

Intraorganizational employee navigation (IEN) is conceptualized as a means of better understanding how the organizational actor proactively works across their firm's internal environment in the execution of their jobs. Navigation is argued to be a precursor to the employee's overall performance through a class of mediating variables labeled “socially derived outcomes,” which are variables inside the organization that are bestowed upon the employee as a result of them first engaging in proactive behavior (e.g., IEN). Two studies are reported. Study I sees IEN psychometrically validated versus a range of existing proactive behaviors and individual traits (discriminant, nomological, and criterion‐related validity) with a heterogeneous sample of 704 employees. Study II then tests a model relating IEN to performance through six mediating “socially derived outcomes” by leveraging data from 2 Fortune 500 firms. The results of Study II show that IEN significantly impacts multiple measures of the employee's overall performance through mediating effects brought about by key socially derived outcomes, such as the employee's “manager alignment.” The contributions, broader implications, and limitations of the research are then put into context.     

Predatory violence aiming at relief in a case of mass murder: Meloy's criteria for applied forensic practice

Mass murder is the result of the complex interaction of several factors. What seems ubiquitous within mass murder are extreme feelings of anger and revenge. Yet despite these intense affective states, mass murders are, as a rule, not behaviorally impulsive, but rather prepared. The presence of extreme hate and anger evokes an impulsive outburst of rage, whereas planning and premeditation point in the direction of a cognitive, rather unemotional deed. This inconsistency is also reflected in reports of offenders' emotional states during the execution of their crimes: while some mass murderers have been described as calm, focused and emotionless during the events, others have shown signs of hostility, confusion, and distress. Considering mass murder from the perspective of its violence mode might shed some light on its nature and dynamics. With respect to the differentiation between affective and predatory violence, Meloy (1988) developed a model for applied forensic practice. The fully documented case of mass murder discussed in this study contains nine indices of predatory violence and one of affective violence. Furious affects of hate and anger were present but appeared to precede the cold-blooded killings. As a matter of fact, it is argued that the offender carried out the predatory murder in order to alleviate the psychological tension and symptoms generated by these severe ego-dystonic affects. The offender thus didn't seem to strive for narcissistic gratification of omnipotence, but rather seemed to aim to solve a problem.     

Comparative interinstrument reliability of uniaxial and triaxial accelerometers in free-living conditions

The aim of this study was to measure the inter-instrument reliability of the ActiGraph and RT3 accelerometers in free-living conditions. 15 healthy adults wore eight ActiGraph accelerometers and five RT3 accelerometers fastened to their back with an elastic belt and adjustable buckle in free-living conditions. For both accelerometers, the inter-instrument coefficient of variation (CV) decreased with increasing physical activity intensity. The inter-instrument CV of the ActiGraph (3% to 10.5%) was significantly lower than that of the RT3 (12.6% to 35.5%; p < 0.05). This finding demonstrates that the ActiGraph has higher inter-instrument reliability than the RT3. For both accelerometers, the inter-instrument reliability was higher for moderate and vigorous physical activity, the two intensities recommended for public health purposes. Studies using these devices can be compared with a low risk of misclassification of participants who meet the recommendation to perform moderate to vigorous physical activity.     

Beyond the myth of venting: Social sharing modes determine the benefits of emotional disclosure

When individuals experience an emotion, they talk about it afterwards. A popular ‘emotional venting’ belief claims that doing so dissolves the emotional impact. This study tested a model of when and how sharing emotions is beneficial. It predicts that benefits vary according to the listener's response mode. A socio‐affective (empathic) mode was expected to buffer emotional distress temporarily. A cognitive (reframing) mode was anticipated to grant emotional recovery. Participants viewed an aversive film and then talked about it with an intimate. The latter was instructed to adopt either cognitive or socio‐affective response modes in a 2 × 2 design (cognitive/non‐cognitive; socio‐affective/neutral). Emotional, cognitive and social benefits were assessed immediately afterwards and again 2 days later following re‐exposure to the film. As predicted, emotional recovery occurred exclusively when the listener stimulated the participant's cognitive work. Cognitive variables (basic assumptions) were also positively modified by these conditions. Listeners' socio‐affective responses entailed enhanced social integration (i.e. greater proximity to the listener; less loneliness) and an impression of feeling better. These results demonstrated that sharing emotions can lead to multiple benefits depending upon the listeners' response modes: emotional recovery, consolidation of shattered assumptions, social integration and temporary distress reduction. Copyright © 2012 John Wiley & Sons, Ltd.     

The effect of time constraints and personality facets on general cognitive ability (GCA) assessment

General cognitive ability (GCA) is a recognized construct for predicting job performance and capacity to learn. However, it has recently been argued that the time constraints under which GCA is assessed might provoke test anxiety, which negatively biases GCA scores. This can then lead to erroneous rejection of qualified candidates in personnel hiring contexts. This paper aimed to investigate: (1) to what extent candidates’ GCA scores increase when tested without time constraints and the ability of this GCA score to predict job performance; and (2) the personality characteristics that hinder GCA test performance under time constraints. Results from two field studies conducted in an actual personnel selection context partially confirmed the hypotheses. They revealed that, aside from the improvement of all candidates’ GCA scores when time constraint was removed, only GCA assessed without time constraints predicts job performance. Furthermore, while all candidates’ scores were influenced by the time constraint condition, individuals who are anxious, low-impulse, low value-questioning and deliberating are more penalized by the time constraint condition of such testing and, thus, are more likely to be erroneously eliminated in a selection process.     

When can categorical variables be treated as continuous? A comparison of robust continuous and categorical SEM estimation methods under suboptimal conditions

A simulation study compared the performance of robust normal theory maximum likelihood (ML) and robust categorical least squares (cat-LS) methodology for estimating confirmatory factor analysis models with ordinal variables. Data were generated from 2 models with 2-7 categories, 4 sample sizes, 2 latent distributions, and 5 patterns of category thresholds. Results revealed that factor loadings and robust standard errors were generally most accurately estimated using cat-LS, especially with fewer than 5 categories; however, factor correlations and model fit were assessed equally well with ML. Cat-LS was found to be more sensitive to sample size and to violations of the assumption of normality of the underlying continuous variables. Normal theory ML was found to be more sensitive to asymmetric category thresholds and was especially biased when estimating large factor loadings. Accordingly, we recommend cat-LS for data sets containing variables with fewer than 5 categories and ML when there are 5 or more categories, sample size is small, and category thresholds are approximately symmetric. With 6-7 categories, results were similar across methods for many conditions; in these cases, either method is acceptable. (PsycINFO Database Record (c) 2012 APA, all rights reserved).     

Re‐Acculturation and Adaptation Among Adolescents From Returned Portuguese Immigrant Families1

The aims of this study were to investigate the degree of psychological and sociocultural adaptation among adolescents from returned Portuguese immigrant families and the factors that may predict adaptation. The study sample consisted of 360 adolescents from returned Portuguese immigrant families who answered a self‐report questionnaire. A control group involving 217 Portuguese youths was also included in the study. Adolescents from returned immigrant families revealed similar levels of psychological adaptation and better sociocultural adaptation in comparison with peers who have never migrated. Predictive factors—sociodemographic and intercultural contact variables—were significantly linked to youths' adaptation. It is concluded that perceived discrimination plays an essential role in re‐acculturation outcomes.     

Cognitive Enhancement and Academic Misconduct: A Study Exploring Their Frequency and Relationship

We investigated the acceptability and use frequency of cognitive enhancement medication and three different types of academic misconduct (plagiarism, cheating, and falsifying/fabricating data). Data collected from a web-based survey of German university students were used in our analysis. Moral acceptability of cognitive enhancers was relatively low and moderate for academic misconduct. The correlation between these measures was moderately weak. The use frequency of cognitive enhancers was lower than for academic misconduct and was (very) lightly correlated with the occurrences of reported plagiarism and fabrication/falsification. A higher acceptability of each act was associated with a higher use frequency of each act.