Career trajectories of Dutch pop musicians: A longitudinal study

Systematic studies of artistic careers are scarce and this is the first large-scale study on the career development of pop musicians. Using a prospective longitudinal approach we followed a sample of aspiring pop musicians in the Netherlands (N = 369) over a three-year period. First we identified four groups of pop musicians with different career patterns, that is, upward careers, downward careers, stable successful careers and stable unsuccessful careers. By means of a multigroup growth mixture model we examined how career success was influenced by social support, professional attitude and professional network. Results showed that successful pop musicians experience more social support, have a stronger professional attitude and a more extensive professional network. Moreover, our study shows that these findings were consistent both between and within the different career pattern groups.     

Perceived responsibility to act: An investigation with respect to registering willingness to become a posthumous organ donor

Two questionnaire studies (Ns=238 and 497) were guided by the original theoretical specification of the triangle model of responsibility. These investigated the relationship between perceived responsibility to register willingness to posthumously donate one's organs and people's self‐reported actual and intended registration behaviour. Exploratory factor analyses suggested that various responsibility‐related constructs could be differentiated, several of which explained unique variance in participants' registration status. Although predominantly derived from it, these constructs provided little support for the specific manner in which the triangle model has previously been conceptualized and operationalized. Implications for theoretical development, future empirical research, and organ procurement are discussed.     

Beyond the mental number line: A neural network model of number–space interactions

It is commonly assumed that there is an interaction between the representations of number and space (e.g., Dehaene et al., 1993, Walsh, 2003), typically ascribed to a mental number line. The exact nature of this interaction has remained elusive, however. Here we propose that spatial aspects are not inherent to number representations, but that instead spatial and numerical representations are separate. However, cultural factors establish ties between them. By extending earlier models (Gevers et al., 2006, Verguts et al., 2005) based on this hypothesis, the authors present computer simulations showing that a model incorporating this idea can account for data from a series of studies. These results suggest that number–space interactions are emergent properties resulting from the interaction between different brain areas.     

A meta-analytic investigation of the structure of posttraumatic stress disorder symptoms

Converging lines of evidence have called into question the validity of conceptualizations of posttraumatic stress disorder (PTSD) based on the Diagnostic and Statistical Manual of Mental Disorders (DSM; American Psychiatric Association, 2000) and suggested alternative structural models of PTSD symptomatology. We conducted a meta-analysis of 40 PTSD studies (N = 14,827 participants across studies) that used a DSM-based measure to assess PTSD severity. We aggregated correlation matrices across studies and then applied confirmatory factor analysis to the aggregated matrices to test the fit of competing models of PTSD symptomatology that have gained support in the literature. Results indicated that both prominent 4-factor models of PTSD symptomatology yielded good model fit across subsamples of studies; however, the model comprising Intrusions, Avoidance, Hyperarousal, and Dysphoria factors appeared to fit better across studies. Results also indicated that the best fitting models were not moderated by measure or sample type. Results are discussed in the context of structural models of PTSD and implications for the diagnostic nosology.     

When animals attack: The effects of mortality salience, infrahumanization of violence, and authoritarianism on support for war

Terror management theory (TMT) suggests that people are motivated to elevate themselves above other animals as a way of denying their creatureliness and mortality. Based on this reasoning, the present study assessed whether infrahumanizing violence by emphasizing its similarities to animal aggression would lead to reduced support for war, especially when mortality is salient. This hypothesis was supported among participants high in right-wing authoritarianism (RWA), who are especially prone to infrahumanize outgroup members and are generally more supportive of military action against outgroups. RWA was associated with greater support for war against Iran, except when primed with thoughts of death and violence as an infrahuman behavior. These data suggest that by portraying violence as something instinctual and creaturely, it may be possible to reduce inter-group hostility and aggression among individuals who tend to be more dispositionally aggressive, particularly in the context of the death awareness that often exacerbates inter-group conflict.     

The role of uncertainty in attentional and choice exploration

Psychonomic Bulletin & Review - The exploitation-exploration (EE) trade-off describes how, when making a decision, an organism must often choose between a safe alternative with a known pay-off,...