A Gentzen Calculus for Nothing but the Truth

In their paper Nothing but the Truth Andreas Pietz and Umberto Rivieccio present Exactly True Logic (ETL), an interesting variation upon the four-valued logic for first-degree entailment FDE that was given by Belnap and Dunn in the 1970s. Pietz & Rivieccio provide this logic with a Hilbert-style axiomatisation and write that finding a nice sequent calculus for the logic will presumably not be easy. But a sequent calculus can be given and in this paper we will show that a calculus for the Belnap-Dunn logic we have defined earlier can in fact be reused for the purpose of characterising ETL, provided a small alteration is made—initial assignments of signs to the sentences of a sequent to be proved must be different from those used for characterising FDE. While Pietz & Rivieccio define ETL on the language of classical propositional logic we also study its consequence relation on an extension of this language that is functionally complete for the underlying four truth values. On this extension the calculus gets a multiple-tree character—two proof trees may be needed to establish one proof.     

Cognitive Alexithymia Mediates the Association Between Avoidant Attachment and Interpersonal Problems in Patients With Somatoform Disorder

Patients with somatoform disorder (SFD) are characterized by the presence of chronic physical complaints that are not fully explained by a general medical condition or another mental disorder. Insecure attachment patterns are common in this patient group, which are often associated with interpersonal difficulties. In the present study, the mediational role of two types of alexithymia and negative affectivity (NA) was examined in the association between attachment styles and interpersonal problems in a group of 120 patients with SFD. Patients were requested to fill out several self-report questionnaires for the assessment of attachment strategies, alexithymia, NA, and interpersonal problems. Cognitive alexithymia (i.e., the inability to identify and verbalize emotions) mediated the relationship between avoidant attachment patterns and interpersonal problems, even after controlling for NA. Preliminary findings also suggested that NA acted as a moderator of the mediator cognitive alexithymia. These results have important implications for clinical practice, as this study clearly shows that interpersonal problems do not automatically follow from insecure attachment strategies, but are contingent upon alexithymic features. It is recommended to target alexithymic features in patients with SFD, particularly in the context of negative emotions. Therefore, cognitive alexithymia may be an important therapeutic focus, specifically in the treatment of avoidant ptients with SFD.     

Multisensory Stimulation to Improve Low- and Higher-Level Sensory Deficits after Stroke: A Systematic Review

The aim of this systematic review was to integrate and assess evidence for the effectiveness of multisensory stimulation (i.e., stimulating at least two of the following sensory systems: visual, auditory, and somatosensory) as a possible rehabilitation method after stroke. Evidence was considered with a focus on low-level, perceptual (visual, auditory and somatosensory deficits), as well as higher-level, cognitive, sensory deficits. We referred to the electronic databases Scopus and PubMed to search for articles that were published before May 2015. Studies were included which evaluated the effects of multisensory stimulation on patients with low- or higher-level sensory deficits caused by stroke. Twenty-one studies were included in this review and the quality of these studies was assessed (based on eight elements: randomization, inclusion of control patient group, blinding of participants, blinding of researchers, follow-up, group size, reporting effect sizes, and reporting time post-stroke). Twenty of the twenty-one included studies demonstrate beneficial effects on low- and/or higher-level sensory deficits after stroke. Notwithstanding these beneficial effects, the quality of the studies is insufficient for valid conclusion that multisensory stimulation can be successfully applied as an effective intervention. A valuable and necessary next step would be to set up well-designed randomized controlled trials to examine the effectiveness of multisensory stimulation as an intervention for low- and/or higher-level sensory deficits after stroke. Finally, we consider the potential mechanisms of multisensory stimulation for rehabilitation to guide this future research.     

Fluctuation of Flow and Affect in Everyday Life: A Second Look at the Paradox of Work

Studies with the Experience Sampling Method (ESM) have shown that individuals experience more flow at work than at leisure. This indicates that people enjoy working but paradoxically at the same time leisure activities are preferred (“paradox of work”). We took a second look at the paradox of work by measuring flow directly, including affect measures, and differentiating between active and passive leisure activities. We also adopted a dynamical approach based on the idea that the transitions of experiences has to be taken into account to get the total picture. For the period of 1 week, data of 100 employees with different professions were collected with the ESM (in total 4,504 measurements). In accordance with existing work, we found that flow was high during work. It was slightly (albeit significantly) higher than during active leisure activities and considerably higher than during passive leisure activities. At the same time, negative activation was low during passive and active leisure activities and lower than during work and vice versa for valence (happiness). Thus, leisure activities do have a positive affective quality that could explain why people prefer leisure to work. Regarding the dynamical approach, we tested whether flow during work would lead to higher valence in leisure but could not support this assumption. We discussed the findings and made suggestions for future research. In an additional analysis, we reveal that perceived outcome experience could partially explain why work and leisure experience differed.     

A Conceptual Structure of Justice - Providing a Tool to Analyse Conceptions of Justice

Justice is a contested concept. There are many different and competing conceptions, i.e. interpretations of the concept. Different domains of justice deal with different fields of application of justice claims, such as structural justice, distributive justice, participatory justice or recognition. We present a formal conceptual structure of justice applicable to all these domains. We show that conceptions of justice can be described by specifying the following conceptual elements: the judicandum (that which is to be judged as just or unjust), the community of justice including claim holders and claim addressees, their claims (and obligations), the informational base for the assessment, the principles of justice, and on a more practical level, the instruments of justice. By specifying these conceptual elements of justice, it is possible to analyse and compare different conceptions of justice, to assess their internal consistency, to explore new definitions of justice in an analytical way, and to explicate an idea of justice in a manner that provides concrete links to the relevant context.     

Predicting Self‐Confident Behaviour with Implicit and Explicit Self‐Esteem Measures

The present research compared the validity of popular direct and indirect measures of self‐esteem in predicting self‐confident behaviour in different social situations. In line with behavioural dual‐process models, both implicit and explicit self‐esteem were hypothesized to be related to appearing self‐confident to unacquainted others. A total of 127 participants responded to the Rosenberg Self‐Esteem Scale, the Multidimensional Self‐Esteem Scale, and an adjective scale for measuring explicit self‐esteem (ESE). Participants' implicit self‐esteem (ISE) was assessed with four indirect measures: the Implicit Association Test (IAT), the name‐letter task (NLT), and two variants of an affective priming task, the reaction‐time affective priming task (RT‐APT) and the error‐based affective priming task (EB‐APT). Self‐confident behaviour was observed in four different social situations: (i) self‐introduction to a group; (ii) an ostracism experience; (iii) an interview about the ostracism experience; and (iv) an interview about one's personal life. In general, appearing self‐confident to unknown others was independently predicted by ESE and ISE. The indirect measures of self‐esteem were, as expected, not correlated, and only the self‐esteem APTs—but not the self‐esteem IAT or the NLT—predicted self‐confident behaviours. It is important to note that in particular the predictive power of the self‐esteem EB‐APT pertained to all four criteria and was incremental to the ESE measures. Copyright © 2016 European Association of Personality Psychology     

The Impact of Absolute Importance and Processing Overlaps on Prospective Memory Performance

Prospective memory is the ability to remember an intention at an appropriate moment in the future. Prospective memory tasks can be more or less important. Previously, importance was manipulated by emphasizing the importance of the prospective memory task relative to the ongoing task it was embedded in. This resulted in better prospective memory performance but also ongoing task costs. In the present study, we simply instructed one group of participants that the prospective memory task was important (i.e., absolute importance instruction) and compared them with a group with relative importance instructions and a control group. The results showed that absolute importance leads to an increase in prospective memory performance without enhancing ongoing task costs, whereas relative importance resulted in both increased prospective memory performance and ongoing task costs. Thus, prospective memory can be enhanced without ongoing task costs, which is particularly crucial for safety‐work contexts. Copyright © 2015 John Wiley & Sons, Ltd.     

What does it take to be a virtual team player? The knowledge,skills, abilities,and other characteristics required in virtual teams

Competency models are available for many aspects of work that cut across various occupations (such as leadership, teamwork, etc.). Although virtual teamwork has developed to a highly prevalent aspect of work, very little is known about the knowledge, skills, abilities, and other characteristics (KSAOs) required. In the current study, KSAO requirements of virtual and traditional business teams (n = 175 and 205, respectively) were compared and aligned to the Great Eight competency model. Results showed that KSAOs pertaining to Leading and Deciding and to Analyzing and Interpreting were more important in virtual teams. Conversely, virtual and traditional teams did not differ in terms of broad personality (Big Five) requirements. Together, these findings contribute to deeper knowledge on selection and training in virtual teams.