Neuroticism,conscientiousness and fruit consumption: Exploring mediator and moderator effects in the theory of planned behaviour

Integrating the theory of planned behaviour (TPB) with the five-factor model (FFM) of personality may provide insight into the cognitive and motivational mechanisms linking personality with health behaviour, but this issue has received very little attention regarding fruit consumption. Mediator effects of TPB concepts in the personality–fruit consumption link, as well as moderator effects of personality in the intention–fruit consumption link, were therefore investigated in the present study. Data on fruit consumption, TPB concepts and FFM dimensions were gathered among 405 respondents in face-to-face interviews using questionnaires. Structural equation modelling was used to investigate the mediator and moderator effects. The direct effect of conscientiousness on fruit consumption was mediated by attitude and perceived behavioural control, while no direct effect of neuroticism on fruit consumption was found. Neuroticism moderated the intention–fruit consumption relationship with the weakest relationship for those scoring high on neuroticism. Conscientiousness did not moderate the intention–fruit consumption relationship. TPB variables are mediators in the conscientiousness–fruit consumption link. Whether fruit consumption is intentional may be dependent upon the personality dimension neuroticism. Personality dimensions may be a useful addition to the TPB and should be considered in health behaviour change interventions.     

Differences in psychosocial factors and fat consumption between stages of change for fat reduction

Abstract

Differences in fat consumption and psychosocial factors between subjects in different trans-theoretical stages of change for fat reduction were studied. Data on fat consumption, self-rated fat intake, attitudes, social support and self-efficacy were collected among a sample of 507 adults. Analysis of variance with Scheffe's multiple-comparison test was used to study differences in these factors between stages of change. Attitudes and social support were most positive among subjects in preparation and action. Self-efficacy expectations were lowest among subjects in contemplation and preparation. Fat consumption was highest among precontemplators hut no substantial differences between other stages were found. It is concluded that subjects in different stages of change differ in psychosocial factors that are regarded as important determinants of behavioral change. Based on these differences it is recommended to develop stage-tailored nutrition education. A majority of subjects in maintenance consumed more fat than is recommended. Therefore, it is suggested that the usually applied staging algorithms might need adjustment for a valid application in nutrition research.     

Protecting the self through consumption: Status goods as affirmational commodities

Individuals conspicuously consume to signal their wealth. As a variant to this economic explanation, four studies explored individual’s psychological need for self-integrity as a potential motivating force for these consumption decisions. Relying on both field and experimental studies, and employing multiple instantiations of high-status goods and self-threat, we demonstrate that individuals consume status-infused products for their reparative effects on the ego. Individuals under self-threat sought ownership of high-status goods to nurse their psychological wounds (Study 1), and when afforded an alternate route to repair their self-integrity, sought these products less (Study 2). Furthermore, among a representative sample of US consumers, low-income individuals’ lowered self-esteem drove their willingness to spend on high-status goods (Study 3). Finally, these high-status goods serve the purpose of shielding an individual’s ego from future self-threats (Study 4). The compensatory role of high-status goods has important implications for consumer decision-making and public policies aimed at reducing consumer debt.     

Why did I eat that? Perspectives on food decision making and dietary restraint

Consumers trying to watch or restrict what they eat face a battle each day as they attempt to navigate the food-rich environments in which they live. Due to the complexity of food decision making, consumers are susceptible to a wide range of social, cognitive, affective, and environmental forces determined to interrupt their intentions to restrict their dietary intake. In this article, we integrate literature from diverse theoretical perspectives into a conceptual framework designed to offer a better understanding of the antecedents, interruptions, and consequences of dietary restraint. We outline a path for researchers to investigate how restraint behaviors in the eating domain influence a wide variety of consumer psychological phenomena. It is our hope that a collective examination of this literature provides a lens that directs future research on food decision making and dietary restraint and empowers consumers to invest their cognitive and behavioral resources towards healthy eating behaviors.     

Ethics in Publication

Summary

This article highlights ethical issues in publication. It addresses the provenance of ideas, problems with joint authorship, plagiarism, and the practice of duplicate submission of material for publication. Confidentiality and privacy matters, and the protection of human subjects in publication of research and clinical case studies are also discussed. The article further examines biases in literature reviews, and in the biased selection of one's best results for publication, intentional misinterpretation of data and the slanting of discussion, summary, and conclusions. Finally, the article deals with ethical problems that can arise in the publication of sponsored research, and the ethical responsibilities of editors and readers.     

A Comparison of Multilevel Imputation Schemes for Random Coefficient Models: Fully Conditional Specification and Joint Model Imputation with Random Covariance Matrices

Abstract

Literature addressing missing data handling for random coefficient models is particularly scant, and the few studies to date have focused on the fully conditional specification framework and “reverse random coefficient” imputation. Although it has not received much attention in the literature, a joint modeling strategy that uses random within-cluster covariance matrices to preserve cluster-specific associations is a promising alternative for random coefficient analyses. This study is apparently the first to directly compare these procedures. Analytic results suggest that both imputation procedures can introduce bias-inducing incompatibilities with a random coefficient analysis model. Problems with fully conditional specification result from an incorrect distributional assumption, whereas joint imputation uses an underparameterized model that assumes uncorrelated intercepts and slopes. Monte Carlo simulations suggest that biases from these issues are tolerable if the missing data rate is 10% or lower and the sample is composed of at least 30 clusters with 15 observations per group. Furthermore, fully conditional specification tends to be superior with intraclass correlations that are typical of crosssectional data (e.g., ICC?=?.10), whereas the joint model is preferable with high values typical of longitudinal designs (e.g., ICC?=?.50).     

Constraints on Arm Selection Processes When Reaching: Degrees of Freedom and Joint Amplitudes Interact to Influence Limb Selection

With an interest in identifying the variables that constrain arm choice when reaching, the authors had 11 right-handed participants perform free-choice and assigned-limb reaches at 9 object positions. The right arm was freely selected 100% of the time when reaching to positions at 30° and 40° into right hemispace. However, the left arm was freely selected to reach to positions at ?30° and ?40° in left hemispace 85% of the time. A comparison between free- and assigned-limb reaching kinematics revealed that free limb selection when reaching to the farthest positions was constrained by joint amplitude requirements and the time devoted to limb deceleration. Differences between free- and assigned-arm reaches were not evident when reaching to the midline and positions of ±10°, even though the right arm was freely selected most often for these positions. Different factors contribute to limb selection as a function of distance into a specific hemispace.     

Why do people rideshare? An experimental study

Enabled by mobile technologies and fueled by the economic downturn, ridesharing has emerged in recent years as a private transportation facet of the shared economy. Our study investigates the motives for participation in situated ridesharing. We propose a theoretical model that includes economic benefits, time benefits, transportation anxiety, trust, and reciprocity either as direct antecedents of ridesharing participation intention, or mediated through attitude towards ridesharing. We conduct a scenario-based survey, with 300 participants. Our findings indicate that, in situations where transportation anxiety is high (e.g. construction on the road), if people can trust the ridesharing service providers and participants, in the presence of economic and time benefits, they will have a strong intention to participate in ridesharing.     

基于消费者自我概念的高尔夫消费动机研究*

首先编制了消费者自我概念量表,对高尔夫球会客人进行了消费者自我概念的测查,将高尔夫消费者划分为事业自我型、交际自我型、精明自我型、家庭自我型和表现自我型五大类,进而分析了这五类消费者在参与高尔夫球运动动机和购买高尔夫球会会籍动机方面的差异。结果表明,(1)锻炼身体是消费者参与高尔夫球运动的主要动机。不同自我概念消费者参与高尔夫运动的动机的差异表现在事业自我型消费者与其他群体的差异显著;(2)商务交往是消费者购买球会会籍动机的主要动机,不同自我概念消费者购买球会会籍动机的差异表现在家庭自我型消费者与交际自我型、表现自我型消费者之间存在显著差异。