Bridging the gap between theory and model: a reflection on the balance scale task

At first glance, the two lead articles in this issue share little except the balance scale task, yet we view them as complementary rather than unrelated or contradictory. Our Reflection focuses on the individual strengths of the two lead articles and, to a greater extent, the potential power of their combined perspectives. Our general approach is to allow psychological theory to suggest a model of performance that can both evaluate specific theoretical claims and reveal important features of the data that had been previously obscured using conventional statistical analyses. Our guiding principle is that model, theory, and data all should be connected.     

Social Categorization in Intergroup Contexts: Three Kinds of Self‐Categorization

In reviewing self‐categorization theory and the literature upon which it is based, we conclude that individuals' attempts to form social categories could lead to three kinds of self‐categorization. We label them intergroup categorization, ingroup categorization, and outgroup categorization. We review literature supporting these three types and argue that they can help to explain and organize the existing evidence. Moreover, we conclude that distinguishing these three kinds of self‐categorization lead to novel predictions regarding social identity, social cognition, and groups. We offer some of those predictions by discussing their potential causes (building from optimal distinctiveness and security seeking literatures) and implications (on topics including prototype complexity, self‐stereotyping, stereotype formation, intergroup behavior, dual identity, conformity, and the psychological implications of perceiving uncategorized collections of people). This paper offers a platform from which to build theoretical and empirical advances in social identity, social cognition, and intergroup relations.     

Conscientiousness and (un)healthy eating: The role of impulsive eating and age in the consumption of daily main meals

The present study aims to explore the relationship between conscientiousness and the consumption of healthy versus unhealthy main meals. Impulsive eating was tested as a mediator in this relationship, as well as direct effects of age on those constructs. A nationwide representative sample of 1,006 Norwegian adults (18–70 years) within a prospective design was used to test a theoretical model. The structural equation model (SEM), in combination with bootstrapping procedures in AMOS, was the principal analytical method. Conscientiousness was negatively associated with unhealthy and impulsive eating. Impulsive eating was a partial mediator between conscientiousness and unhealthy eating and a full mediator between conscientiousness and healthy eating. Age was positively correlated with conscientiousness and this relationship had an inverted U‐shape form. Finally, age was negatively associated with unhealthy and impulsive eating, and positively associated with healthy eating. This study confirmed the relevance of conscientiousness for healthy, unhealthy, and impulsive eating.     

Changes in Income Predict Change in Social Trust: A Longitudinal Analysis

Social trust is a psychological variable important to politics, the community, and health. Theorists have predicted that socioeconomic status determines social trust, but also that social trust determines socioeconomic status. The current study tested the viability of both causal directions using longitudinal data from representative samples of the United States and the United Kingdom. Results demonstrated that a model where increases in socioeconomic status (measured by income) predict increases in social trust is more viable than a model where increases in social trust predict increases in socioeconomic status.     

Salesperson brand attachment: a job demands-resources theory perspective

Sales researchers have largely ignored the idea that salespeople form attachments to the brands that they sell, and that these attachments hold important consequences for sales outcomes. Drawing on job demands-resources theory, the authors suggest that salesperson brand attachment (SBA) serves as a unique psychological resource for salespeople. Using data from 154 salespeople from the beverage industry, they provide evidence that SBA increases selling effort toward the brand, and ultimately job satisfaction. In addition, they show that salesperson's brand attachment acts as a buffer against perceived job demands, including job codification and hierarchy of authority. In general, results support the job demands-resources framework and confirm that SBA is a resource that may be leveraged to offset job demands, under certain situations.     

The influence of different dialysis modalities on the quality of life of patients with end-stage renal disease: A systematic literature review

Objectives: This study aims to generate evidence regarding the relationships of different dialysis modalities with HR-QOL.

Design: A systematic review was conducted to investigate the HR-QOL of patients treated with different dialysis modalities.

Methods: A literature search was conducted for English language articles in the CINAHL, Medline and PubMed databases published from January 1990 through May 2016. Specifically, we sought articles that would compare the HR-QOL of hemodialysis (HD) and peritoneal dialysis (PD) patients in terms of physiological, psychological and social functioning, as well as disease symptoms. Thirty-four articles met the study inclusion criteria and were included into the analysis.

Results: The research results indicated no significant differences in HR-QOL between HD and PD treatment. However, a higher percentage of patients who received PD had a better HR-QOL in terms of physiological, psychological, social and disease symptoms.

Conclusions: Despite the fact that the results of this study showed no difference in HR-QOL between HD and PD treatment, its review of relevant references can serve as a reference for health professionals. However, patients’ conditions must still be taken into account when making suggestions about which dialysis modality a patient should use.