scholarly journals Metabolic Endotoxemia: A Potential Underlying Mechanism of the Relationship between Dietary Fat Intake and Risk for Cognitive Impairments in Humans?

Nutrients ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1887 ◽  
Author(s):  
André ◽  
Laugerette ◽  
Féart

(1) Background: Nutrition is a major lifestyle factor that can prevent the risk of cognitive impairment and dementia. Diet-induced metabolic endotoxemia has been proposed as a major root cause of inflammation and these pathways emerge as detrimental factors of healthy ageing. The aim of this paper was to update research focusing on the relationship between a fat-rich diet and endotoxemia, and to discuss the potential role of endotoxemia in cognitive performances. (2) Methods: We conducted a non-systematic literature review based on the PubMed database related to fat-rich meals, metabolic endotoxemia and cognitive disorders including dementia in humans. A total of 40 articles out of 942 in the first screening met the inclusion criteria. (3) Results: Evidence suggested that a fat-rich diet, depending on its quality, quantity and concomitant healthy food components, could influence metabolic endotoxemia. Since only heterogeneous cross-sectional studies are available, it remains unclear to what extent endotoxemia could be associated or not with cognitive disorders and dementia. (4) Conclusions: A fat-rich diet has the capability to provide significant increases in circulating endotoxins, which highlights nutritional strategies as a promising area for future research on inflammatory-associated diseases. The role of endotoxemia in cognitive disorders and dementia remains unclear and deserves further investigation.

2021 ◽  
Vol 32 (2) ◽  
pp. 85-105
Author(s):  
Ramon van Ingen ◽  
Melanie De Ruiter ◽  
Pascale Peters ◽  
Bas Kodden ◽  
Henry Robben

Drawing from self-determination theory and person-organization fit theory, the present study contributes to the literature on organizational purpose by examining the relationship between perceived organizational purpose and work engagement and the mediating role of person-organizational purpose (P-OP) fit herein. Based on data from a cross-sectional quantitative study among 517 knowledge workers from five financial service organizations, we tested two possible psychological mechanisms underlying the direct and indirect relationships between perceived organizational purpose and work engagement. The results of our structural equation modelling confirmed the hypothesized indirect effect model in which perceived organizational purpose was positively associated with work engagement, both directly and indirectly via P-OP fit. These findings show that organizational purpose has the capacity to directly and indirectly foster work engagement. The study suggests avenues for future research in OB, strategic HRM, and marketing.


2012 ◽  
Vol 40 (4) ◽  
pp. 649-655 ◽  
Author(s):  
Jian An Zhong ◽  
Zhong-Liang Cao ◽  
Yuanyuan Huo ◽  
Ziguang Chen ◽  
Wing Lam

The associations between neuroticism, employees' preference of emotional labor strategies, and job feedback were investigated using a cross-sectional self-report questionnaire survey. The mediating effect of job feedback was tested using regression analysis with a sample of 168 nurses. Results showed that neuroticism was associated more with surface acting, and less with both deep acting and job feedback; job feedback fully mediated the relationship between neuroticism and deep acting. Implications and directions for future research and practices are suggested.


10.28945/4670 ◽  
2020 ◽  
Vol 15 ◽  
pp. 737-758
Author(s):  
Anna Sverdlik ◽  
Nathan C. Hall ◽  
Lynn McAlpine

Aim/Purpose: Research on doctoral students’ well-being suggests that an interplay of social and psychological factors, such as integration into the scholarly community and perceptions of self-worth, shape students’ experiences. The present research examined the role of these factors in the well-being of doctoral students. Background: Imposter syndrome has long been discussed both formally and informally as a prevalent experience of doctoral students. Existing research provides empirical support for the role of perceived belongingness to one’s scholarly community in maladaptive self-perceptions (i.e., imposter syndrome), as well as the role of imposter syndrome in doctoral students’ well-being. However, no studies to date have directly explored the extent to which imposter syndrome mediates the relationship between perceived belongingness and well-being in a single model. Methodology: The present research sought to evaluate perceived belongingness as a predictor of imposter syndrome and how imposter syndrome, in turn, predicts well-being (i.e., depression, stress, and illness symptoms) in doctoral students. Depression, stress, and illness symptoms were identified in the literature as the most prevalent well-being concerns reported by doctoral students and therefore were evaluated as the outcome variables in the present research. In line with previous research, we expected perceived belongingness to negatively predict imposter syndrome, and imposter syndrome, in turn, to positively predict depression, stress, and illness symptoms. Two studies evaluated the proposed model. Data for both studies was collected simultaneously (i.e., one large sample) with 25% of the sample randomly selected for Study 1 (cross-sectional) and the remainder included in Study 2 (longitudinal). In Study 1, we tested this hypothesis with a cross-sectional design and explored whether imposter syndrome was a significant mediator between perceived belongingness and well-being. In Study 2, we aimed to replicate and extend the results of Study 1 with a prospective design to further assess the directionality of the relationship from perceived belongingness to imposter syndrome and, in turn, the role of imposter syndrome in changes in depression, stress, and illness symptoms over a five-month period. Contribution: The present results represent evidence of the process by which doctoral students develop imposter syndrome and some of the consequences of imposter syndrome on doctoral well-being. Additionally, the present study includes a large-scale sample of international doctoral students across the disciplines, thus revealing the prevalence of imposter syndrome in the doctoral experience. Findings: Overall, the results of the present research provided support for our hypotheses. In Study 1, perceived belongingness was found to be a negative predictor of imposter syndrome that, in turn, predicted higher levels of depression, stress, and illness symptoms. Additionally, imposter syndrome was found to significantly mediate the relationship between perceived scholarly belongingness and the three outcome variables assessing psychological well-being. Study 2 further revealed perceived scholarly belongingness to negatively predict imposter syndrome five months later, with imposter syndrome, in turn, predicting increases in depression, stress, and illness symptoms in our doctoral student sample. Recommendations for Practitioners: Several recommendations are made for practitioner based on the present findings: First, by acknowledging the critical role of perceived social belongingness in students’ well-being, faculty and administrators can establish structures to better integrate students into their scholarly communities, and departments can foster a supportive social atmosphere for their doctoral students that emphasizes the quality of interactions and consultation with faculty. Second, information sessions for first-year doctoral students could highlight the prevalence and remedies of feeling like an impostor to normalize these otherwise deleterious feelings of inadequacy. Finally, professional development seminars that are typically taught in graduate programs could incorporate an explicit discussion of well-being topics and the prevalence of imposter syndrome, alongside other pragmatic topics (e.g., publishing protocols), to ensure that students perceive their departmental climate as supportive and, in turn, feel less like an imposter and better psychologically adjusted. Recommendation for Researchers: Researchers should continue exploring the various antecedents and consequences of imposter syndrome, specifically focusing on at-risk students, as well as the role of imposter syndrome in doctoral-level dropout. Impact on Society: Imposter syndrome is a harmful experience that can lead to a variety of life-altering outcomes, such as developing or intensifying a mental illness. Doctoral students, as society’s future researchers and high-skilled professionals, have a great impact on society as a whole, and efforts should be extended into maintaining doctoral students’ well-being in order for them to perform at an optimal level. The present research sheds light on one aspect of the doctoral experience that is detrimental to the well-being of doctoral students, thus informing doctoral students, advisors, and departments of one area where more resources can be allocated in order to facilitate the health, both physical and psychological, of their students. Future Research: Future research should explore additional outcomes to fully understand the impact of perceived belongingness and imposter syndrome on doctoral students. Some such outcomes may include academic performance (e.g., presentation/publication rates), motivation (e.g., perseverance vs. intention to quit), and more general psychological adjustment measures (e.g., satisfaction with life). Such research, in combination with the present findings, can help the understanding of the full impact of imposter syndrome on the academic and personal experiences of doctoral students and can contribute to psychologically healthier and more academically productive experiences for doctoral students as they navigate the myriad challenges of doctoral education.


2014 ◽  
Vol 18 (3) ◽  
pp. 538-550 ◽  
Author(s):  
Carlos Ferreira Peralta ◽  
Maria Francisca Saldanha

Purpose – This research aims to evaluate if knowledge-centered culture (KCC) fosters knowledge sharing equally across employees with different levels of trust propensity, an enduring individual characteristic. Design/methodology/approach – A cross-sectional questionnaire study was conducted with 128 US-based employees. Findings – The authors found that KCC only promoted knowledge sharing in individuals with high levels of trust propensity. For individuals with low levels of trust propensity, KCC had no effect on knowledge sharing. Research limitations/implications – The authors focused exclusively on trust propensity as a moderator. Future research could analyze the role of other enduring individual differences in the relationship between KCC and knowledge sharing. Practical implications – A KCC may be inefficient in promoting knowledge sharing in employees with low propensity to trust. Recruitment and selection of individuals with a high propensity to trust is a possible solution to enhance the association between KCC and knowledge sharing in organizations. Originality/value – By identifying an enduring individual characteristic that shapes the relationship between KCC and knowledge sharing, the authors move toward the development of a contingent view of KCC and show that KCC fosters knowledge sharing differently across employees.


2017 ◽  
Vol 16 (3) ◽  
pp. 155-159 ◽  
Author(s):  
Peizhen Sun ◽  
Jennifer J. Chen ◽  
Hongyan Jiang

Abstract. This study investigated the mediating role of coping humor in the relationship between emotional intelligence (EI) and job satisfaction. Participants were 398 primary school teachers in China, who completed the Wong Law Emotional Intelligence Scale, Coping Humor Scale, and Overall Job Satisfaction Scale. Results showed that coping humor was a significant mediator between EI and job satisfaction. A further examination revealed, however, that coping humor only mediated two sub-dimensions of EI (use of emotion and regulation of emotion) and job satisfaction. Implications for future research and limitations of the study are discussed.


2020 ◽  
Vol 4 (1) ◽  
pp. 86-102
Author(s):  
Tasnim Rehna ◽  
Rubina Hanif ◽  
Muhammad Aqeel

Background: Widespread social paradigms on which the status variances are grounded in any society, gender plays pivotal role in manifestation of mental health problems (Rutter, 2007). A hefty volume of research has addressed the issue in adults nonetheless, little is vividly known about the role of gender in adolescent psychopathology. Sample: A sample of 240 adolescents (125 boys, 115 girls) aging 12-18 years was amassed from various secondary schools of Islamabad with the approval of the Federal Directorate of Education (FDE), relevant authorities of the schools and the adolescents themselves. Instruments: Taylor Manifest Anxiety Scale (Taylor & Spence, 1953) and Children’s Negative Cognitive Errors Questionnaire (CNCEQ) by Leitenberg et al., (1986) were applied in present study. Results: Multiple regression analysis revealed that cognitive errors jointly accounted for 78% of variance in predicting anxiety among adolescents. Findings also exhibited that gender significantly moderated the relationship between cognitive errors and adolescent anxiety. Implications of the findings are discoursed for future research and clinical practice.


2018 ◽  
Author(s):  
Jason G. Ellis ◽  
Sarah Allen ◽  
Michael Perlis ◽  
Michael Grandner ◽  
Maria Gardani ◽  
...  

The aim of the present study was to determine whether normal sleepers with vulnerability to insomnia, via high sleep reactivity, demonstrate more sleep-related dysfunctional cognitions and behaviours and poorer psychological health compared to those who are not vulnerable. Further, the influence of stress on the relationship between sleep reactivity and psychological health was also examined. A cross-sectional survey of 737 young adult ‘normal’ sleepers from the general population was undertaken. Results indicated normal sleepers vulnerable to insomnia demonstrated more sleep-related dysfunctional cognitions and behaviours as well as poorer psychological health compared to those not vulnerable. Furthermore, the relationship between sleep reactivity and psychological health was moderated by perceived stress over the previous month and life events over the previous year. Therefore, identifying and supporting those who are vulnerable to insomnia may be a fruitful avenue for preventative public health campaign to mitigate both insomnia and poor psychological health.


Author(s):  
Leana A. Bouffard ◽  
Haerim Jin

This chapter provides an overview of the literature examining the role of religion and military service in the desistance process. It also identifies outstanding issues and directions for future research. It first presents an overview of research examining the role of religion in desistance and highlights measurement issues, potential intervening mechanisms, and a consideration of faith-based programs as criminal justice policy. Next, this chapter covers the relationship between military service and offending patterns, including period effects that explain variation in the relationship, selection effects, and the incorporation of military factors in criminal justice policy and programming. The chapter concludes by highlighting general conclusions from these two bodies of research and questions to be considered in future research.


Author(s):  
Maryann Feldman ◽  
Paige Clayton

This chapter examines the relationship between entrepreneurs and the communities in which they are embedded. It argues that the actions of entrepreneurs and their firms are contextually situated in specific geographies that make their actions endogenous in the development of place and define a place-specific institutional logic. This argument is at odds with the view that industry clustering is due to the role of incumbent firms. This chapter reconciles these views by adopting a temporal view, allowing both incumbents and geography to co-occur and influence clustering. It then considers the current evidence of entrepreneurs’ effects on regional resources and capacity, and concludes with suggestions for future research.


Author(s):  
Katherine H. Rogers

When forming impressions of an other’s personality, people often rely on information not directly related to the individual at hand. One source of information that can influence people’s impressions of others is the personality of the average person (i.e., normative profile). This relationship between the normative profile and an impression is called normative accuracy or normativity. In this chapter, you will learn about the average personality, why it is important, the relationship to social desirability and what it means to have a normative impression, as well as correlates and moderators of normativity. More broadly, you will learn about current research and views regarding the normative profile and normative impressions as well as concrete steps for incorporating this approach into your future research on interpersonal perception.


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