The Job Demands-Resources Model and Job Burnout: The Mediating Role of Personal Resources

The primary purpose of this study is to test whether the effect of workload on emotional exhaustion (health impairment process) and social support on depersonalization (motivation process) could be mediated by personal resources such as self-efficacy, self-esteem and optimism. Two multiple mediation models are tested separately, and then the point estimate and bias-corrected and accelerated 95 % confidence interval of the total and specific indirect effect are determined using the bootstrap approach with 1000 bootstrapped samples. The results show that workload positively affects emotional exhaustion, whereas social support negatively affects depersonalization, thus further corroborating the health impairment process and motivation process as assumed by the job demands-resources (JD-R) model. The total indirect effect is significant for both models, and self-esteem and optimism are the significant mediators for the health impairment process, whereas only optimism is the significant mediator for the motivation process.     

Making Choices: Ethical Decisions in a Global Context

The changing milieu of research—increasingly global, interdisciplinary and collaborative—prompts greater emphasis on cultural context and upon partnership with international scholars and diverse community groups. Ethics training, however, tends to ignore the cross-cultural challenges of making ethical choices. This paper confronts those challenges by presenting a new curricular model developed by an international team. It examines ethics across a very broad range of situations, using case studies and employing the perspectives of social science, humanities and the sciences. The course has been developed and taught in a highly collaborative way, involving researchers and students at Zhejiang University, the Indian Institute of Technology, Bombay and Brown University. The article presents the curricular modules of the course, learning outcomes, an assessment framework developed for the project, and a discussion of evaluation findings.     

Gender differences in irritable bowel syndrome among medical students at Inner Mongolia Medical University,China: a cross-sectional study

There is little epidemiological research on Irritable bowel syndrome (IBS) in Inner Mongolia, China. Here we investigated the prevalence of IBS and factors associated with IBS in both males and females in Inner Mongolia Medical University by a cross-sectional study. We recruited Inner Mongolia Medical University students residing in campus and asked them to complete a self-administered questionnaire. The prevalence of IBS in each factor we chose in all, male, and female students was determined. We assessed IBS subtypes in male and female students. Multivariate logistic regression models were used to assess the factors associated with IBS in male and female students. The overall prevalence of IBS was 29.5%. The prevalence of IBS in female students was significantly higher than that in male students (31.3% vs. 24.8%, p < .001). Logistic regression results showed that attempting to lose weight and anxiety were both associated with increasing odds of IBS, while exercise was not associated with IBS in either male or female students. In female students, snack consumption and depression were also both associated with increasing odds of IBS. The predominant IBS subtype was the diarrhea-predominant type in both male and female students. Considering the high prevalence of IBS in students and the fact that the factors associated with IBS can be improved by individuals, students should be given adequate education and counseling to improve their mental health and lifestyle, especially female students in higher grades.     

Validation of the Volunteer Motivation Scale and its relations with work climate and intention among Chinese volunteers

Grounded in self‐determination theory (SDT; Deci & Ryan, 1985), this two‐phase research examines the reliability and validity of the Volunteer Motivation Scale with Chinese volunteers (VMS‐C) and its relationship with the supportive work climate and intention to continue being a volunteer. In Study 1, the initial item pool of the VMS‐C with 18 items measuring six motivation types was administrated to Chinese volunteers (N = 362). Factor analysis led to a five‐factor model with 15 items. This model was cross‐validated using confirmatory factor analysis. The five factors were intrinsic motivation, identified regulation, introjected regulation, external regulation and amotivation. In Study 2, the relationships between different types of motivation (i.e. autonomous motivation, controlled motivation, amotivation) and two variables of interests, namely, supportive work climate and intention to stay, were investigated (N = 228). It was found that autonomous motivation (i.e. intrinsic motivation, identified regulation) were positively related to both supportive work climate and intention to stay. Controlled motivation (i.e. introjected regulation, external regulation) and amotivation were negatively associated with the two variables. The current findings are consistent with SDT. More studies guided by the theory in the volunteering area are recommended.     

Examining the reliability of ADAS-Cog change scores

The purpose of this study was to estimate and examine ways to improve the reliability of change scores on the Alzheimer’s Disease Assessment Scale, Cognitive Subtest (ADAS-Cog). The sample, provided by the Alzheimer’s Disease Neuroimaging Initiative, included individuals with Alzheimer’s disease (AD) (n = 153) and individuals with mild cognitive impairment (MCI) (n = 352). All participants were administered the ADAS-Cog at baseline and 1 year, and change scores were calculated as the difference in scores over the 1-year period. Three types of change score reliabilities were estimated using multivariate generalizability. Two methods to increase change score reliability were evaluated: reweighting the subtests of the scale and adding more subtests. Reliability of ADAS-Cog change scores over 1 year was low for both the AD sample (ranging from .53 to .64) and the MCI sample (.39 to .61). Reweighting the change scores from the AD sample improved reliability (.68 to .76), but lengthening provided no useful improvement for either sample. The MCI change scores had low reliability, even with reweighting and adding additional subtests. The ADAS-Cog scores had low reliability for measuring change. Researchers using the ADAS-Cog should estimate and report reliability for their use of the change scores. The ADAS-Cog change scores are not recommended for assessment of meaningful clinical change.     

A study of mild cognitive impairment in veterans: role of hypertension and other confounding factors

Introduction: Hypertension has shown to be an important risk factor for the decline in cognitive function. Aim of our study is to investigate the presence of cognitive impairment of the elders with hypertension and other confounding factors.

Methods: This study was conducted on 400 veterans who were matched one-to-one with the confounding factors for assessing the presence of mild cognitive impairment using both MMSE and Montreal Cognitive Assessment (MoCA). The 13 related factors of patient data were studied.

Results: The prevalence rate of cognitive impairment was 29.25%. Age (OR 2.679, 95%CI 1.663–6.875), sleep impairment (OR 1.117, 95%CI 1.754–7.422), uncontrolled hypertension (OR 1.522, 95%CI 1.968–4.454), type 2 diabetes (OR 2.464, 95%CI 1.232–4.931), and hyperlipidaemia (OR 1.411, 95%CI 1.221–8.988) are the risk factors for the cognitive deterioration, while the protective factors are high level of education (OR 0.032, 95%CI 0.007–0.149) and regular exercise (OR 0.307, 95%CI 0.115–0.818).

Discussion: Because some vascular disease risk factors, such as hypertension, can be treated effectively, cognitive decline related to these risk factors, and vascular disease per se, may be prevented or its course modified through more aggressive treatment and improved compliance.     

Effects of social dominance orientation and right‐wing authoritarianism on corrupt intention: The role of moral outrage

Previous research suggested that dominance orientation and authoritarianism may be associated with corruption, but little research has verified this assumption or uncovered its psychological processes. In this article, we examined empirically the relationships between social dominance orientation (SDO), right‐wing authoritarianism (RWA) and corrupt intention and explored the mediating role of moral outrage on these relationships. A total of 677 college students participated in the study and completed measures of SDO, RWA, moral outrage and corrupt intention. Our findings demonstrated that both SDO and RWA were positively associated with corrupt intention. Additionally, moral outrage partially mediated the relation between SDO and corrupt intention and fully mediated the relation between RWA and corrupt intention. Specifically, the results indicated that higher SDO or RWA was associated with reduced moral outrage and increased corrupt intention. This implies that the enhancement of morality and moral outrage may inhibit corrupt intention.     

Latent Variable Selection for Multidimensional Item Response Theory Models via $$L_{1}$$ Regularization

We develop a latent variable selection method for multidimensional item response theory models. The proposed method identifies latent traits probed by items of a multidimensional test. Its basic strategy is to impose an \(L_{1}\) penalty term to the log-likelihood. The computation is carried out by the expectation–maximization algorithm combined with the coordinate descent algorithm. Simulation studies show that the resulting estimator provides an effective way in correctly identifying the latent structures. The method is applied to a real dataset involving the Eysenck Personality Questionnaire.