Testing the triple-match principle among technology employees

The triple-match principle (TMP) proposes that the strongest, interactive relationships between job demands and job resources are observed when job demands, job resources and job-related outcomes are based on qualitatively identical dimensions. This principle is tested with regard to three outcomes: cognitive failure, emotional exhaustion, and physical health complaints. Data were collected in a large sample of employees in the technology sector (n = 1533). Results demonstrate that the positive association between emotional job demands and emotional exhaustion is compensated by the availability of emotional job resources. No triple-match interactions are found with regard to cognitive failure or physical health complaints. In line with the TMP, results show that the likelihood of finding theoretically valid interactions is related to the degree of match between job demands, job resources, and outcomes.     

The importance of religiosity and values in predicting political attitudes: Evidence for the continuing importance of religiosity in Flanders (Belgium)

It has often been argued that religions influence political attitudes only indirectly by their influence on the value system of believers. This value system, in turn, is supposed to be used as a guideline in forming political attitudes. Thus, in this view, it should be sufficient to focus on value orientations if one wants to examine religion's influence on political attitudes. However, results of this study among first year psychology students (n=389), show that although value orientations hold greater predictive strength than religiosity towards political attitudes in Flanders (Belgium), religiosity, even apart from values, does provide additional information in predicting political attitudes. Thus, our results suggest that, at least in Flanders, religion, even apart from values, is still a politically important force. The most important value types, as measured by the Schwartz' Value Inventory (Schwartz, 1992), and religiosity dimensions, as measured by the Post-Critical Belief scale (Desimpelaere et al., 1999), associated with political attitudes were identified. Results show that each political attitude included in this study (economic conservatism, cultural conservatism, racism and nationalism) is predicted by a more or less unique pattern of religiosity dimensions and value orientations.     

Using trained pouched rats to detect land mines: another victory for operant conditioning

We used giant African pouched rats (Cricetomys gambianus) as land mine-detection animals in Mozambique because they have an excellent sense of smell, weigh too little to activate mines, and are native to sub-Saharan Africa, and therefore are resistant to local parasites and diseases. In 2009 the rats searched 93,400 m(2) of land, finding 41 mines and 54 other explosive devices. Humans with metal detectors found no additional mines. On average, the rats emitted 0.33 false alarm for every 100 m(2) searched, which is below the threshold given by International Mine Action Standards for accrediting mine-detection animals. These findings indicate that Cricetomys are accurate mine-detection animals and merit continued use in this capacity.     

Statistical Significance of the Contribution of Variables to the PCA solution: An Alternative Permutation Strategy

In this paper, the statistical significance of the contribution of variables to the principal components in principal components analysis (PCA) is assessed nonparametrically by the use of permutation tests. We compare a new strategy to a strategy used in previous research consisting of permuting the columns (variables) of a data matrix independently and concurrently, thus destroying the entire correlational structure of the data. This strategy is considered appropriate for assessing the significance of the PCA solution as a whole, but is not suitable for assessing the significance of the contribution of single variables. Alternatively, we propose a strategy involving permutation of one variable at a time, while keeping the other variables fixed. We compare the two approaches in a simulation study, considering proportions of Type I and Type II error. We use two corrections for multiple testing: the Bonferroni correction and controlling the False Discovery Rate (FDR). To assess the significance of the variance accounted for by the variables, permuting one variable at a time, combined with FDR correction, yields the most favorable results. This optimal strategy is applied to an empirical data set, and results are compared with bootstrap confidence intervals.     

Response preparation in Parkinson's disease: automatic vs. controlled processing

Using a finger cuing paradigm, we investigated response preparation in Parkinson's disease (PD). The central question was whether PD individuals are differentially affected by preparatory cues that specify a more automatic response set configuration (that induces within-hand preparation) as opposed to a more controlled one (that induces between-hands preparation). Reaction times (RTs) and error rates were measured in 20 non-demented individuals with PD and 20 healthy control participants with a long and short preparation interval (500 ms and 2000 ms). RT benefits and/or costs were measured for cues indicating a within- and between-hands motor preparatory set. Overall, RTs were significantly longer, and errors more frequent, for PD participants than for control participants. More importantly, in comparison with control subjects, PD individuals showed a significant deficit in between-hands preparation but not in within-hand preparation. Furthermore, longer preparation intervals slowed down cued RTs of the control participants, but not those of the PD individuals. Together, these findings suggest that whereas automatic response preparation processes are spared in PD, controlled response preparation processes operate at a slower rate and/or are delayed in time.     

Beyond shared perceptions of trust and monitoring in teams: implications of asymmetry and dissensus

Past research has implicitly assumed that only mean levels of trust and monitoring in teams are critical for explaining their interrelations and their relationships with team performance. In this article, the authors argue that it is equally important to consider the dispersion in trust and monitoring that exists within teams. The authors introduce "trust asymmetry" and "monitoring dissensus" as critical dispersion properties of trust and monitoring and hypothesize that these moderate the relationships between mean monitoring, mean trust, and team performance. Data from a cross-lagged panel study and a partially lagged study support the hypotheses. The first study also offered support for an integrative model that includes mean and dispersion levels of both trust and monitoring. Overall, the studies provide a comprehensive and clear picture of how trust and monitoring emerge and function at the team level via mean and dispersion.     

A process-content approach to adolescent identity formation: examining longitudinal associations between identity styles and goal pursuits

Research on identity focuses on the processes involved (e.g., identity style) or its content (e.g., goals and values), but limited research has addressed both issues simultaneously. The present study investigates cross‐lagged relations between identity styles (i.e., informational, normative, and diffuse‐avoidant) and goals (i.e., intrinsic vs. extrinsic and openness to change vs. conservation) in a 3‐wave adolescent sample (N = 806). Results support a reciprocal model, with process and content influencing each other. As for process effects, the informational and diffuse‐avoidant style predicted decreases in conservation goals, and the normative style predicted increases in conservation and extrinsic goals. As for content effects, conservation goals increased the normative style, and extrinsic goals decreased the informational and increased the diffuse‐avoidant style.     

Daily fluctuations in perfectionism dimensions and their relation to eating disorder symptoms

Multidimensional perfectionism has been shown to play an important role in eating disorders (EDs). However, research examining this relation has primarily focused on relatively stable inter-individual differences between persons, thereby failing to examine how these variables are associated within individuals on a daily basis. This study examines how daily fluctuations in Personal Standards (PS) perfectionism and Evaluative Concerns (EC) perfectionism relate to each other and to fluctuations in ED symptoms. Adolescents (N = 275) completed questionnaires each evening during seven consecutive days. Multilevel modeling showed significant day-to-day fluctuations in PS and EC perfectionism, and showed that both dimensions are intertwined in the day. Among females, fluctuations in EC perfectionism co-varied with fluctuations in ED symptoms.     

The Influence of Group Size and Stigma Severity on Social Acceptance: The Case of People with Intellectual Disability Moving into Neighbourhoods

Dutch adults from a nationwide Internet panel (N = 426) were asked to imagine that their next‐door neighbours would move out and that people with intellectual disability would move in. Severity of disability and group size were varied to manipulate intergroup threat. These two factors independently influenced social acceptance and a variety of emotional and behavioural measures. In particular, it was found that a large group with severe disability aroused the strongest negative response, whereas a small group with mild disability aroused the weakest negative response. Small groups with a severe disability and large groups with a mild disability aroused similar and intermediate negative responses. Results are discussed in terms of theories of intergroup threat and stigmatisation. Practical implications for predicting the success of de‐institutionalisation and social integration of groups with special needs are addressed. Copyright © 2011 John Wiley & Sons, Ltd.     

Developmental Improvements in Perceptual Restoration: Can Young Children Reconstruct Missing Sounds in Noisy Environments?

Young children are frequently exposed to sounds such as speech and music in noisy listening conditions, which have the potential to disrupt their learning. Missing input that is masked by louder sounds can, under the right conditions, be ‘filled in’ by the perceptual system using a process known as perceptual restoration. This experiment compared the ability of 4‐ to 6‐year‐old children, 9‐ to 11‐year‐old children and adults to complete a melody identification task using perceptual restoration. Melodies were presented either intact (complete input), with noise‐filled gaps (partial input; perceptual restoration can occur) or with silence‐filled gaps (partial input; perceptual restoration cannot occur). All age groups could use perceptual restoration to help them interpret partial input, yet perception was the most detrimentally affected by the presentation of partial input for the youngest children. This implies that they might have more difficulty perceiving sounds in noisy environments than older children or adults. Young children had particular difficulty using partial input for identification under conditions where perceptual restoration could not occur. These findings suggest that perceptual restoration is a crucial mechanism in young children, where processes that fill in missing sensory input represent an important part of the way meaning is extracted from a complex sensory world. Copyright © 2011 John Wiley & Sons, Ltd.