Heterogeneity in Dementia and Mild Cognitive Impairment

Author(s):  
Deborah A. G. Drabick ◽  
Jill Rabinowitz

Mild cognitive impairment (MCI) and dementia such as Alzheimer’s disease and vascular dementia are heterogeneous conditions that are associated with a chronic course and impairments across a multitude of neurobiological and neuropsychological domains. Until relatively recently, much research has relied on variable-centered techniques (e.g., structural equation modeling, factor analysis, regression) to delineate and study these conditions. This chapter presents evidence of the potential benefits of using person-centered procedures (e.g., latent class analysis) for identifying more homogeneous subgroups of individuals with MCI or dementia that may have distinct correlates, courses, and potential responses to interventions. The research reviewed in this chapter indicates that these strategies permit clinicians and investigators to (a) identify subgroups of individuals who differ in the frequency and/or quality of signs and symptoms, correlates, course, or outcomes, and (b) externally validate and provide support for the predictive validity of these subgroups. Steps for conducting latent class/profile analysis are presented, as well as indices used in selecting the best-fitting model. Implications for assessment, intervention, and future research are provided.

2019 ◽  
Vol 35 (5) ◽  
pp. 1168-1179
Author(s):  
Sylvia Broetje ◽  
Georg F Bauer ◽  
Gregor J Jenny

Abstract Sense of coherence (SoC) has been identified as an important health resource and is associated with various health-related outcomes, especially perceived health and mental health. SoC has also been found to be relevant in the work context. Our study examined whether job resources, such as autonomy or social support, can contribute to the development of SoC. We also examined the role of the setting-specific work-related sense of coherence (Work-SoC) as well as reciprocal relationships between the three variables. Participants (941) from Germany, Switzerland and Austria completed our questionnaires at three waves of data collection. Structural equation modeling was used to identify the best fitting model and interpret the relationships between variables. Our first hypothesis that job resources predict Work-SoC and that Work-SoC predicts SoC was confirmed. We also found support for our second hypothesis that SoC predicts Work-SoC and that Work-SoC predicts job resources. The indirect effects through Work-SoC were only marginally significant in both directions. Our findings illustrate complex and multidirectional relationships between the variables. Job resources seem to contribute to the strengthening of Work-SoC, which seems to set in motion a gain cycle of improved job resources, which again contribute to a higher Work-SoC. Over time, this might contribute to strengthening general SoC. However, our findings showed that SoC was highly stable over the observed 3-month interval, limiting the effect any other variable could exert on it. Future research should further examine the mechanisms and timeframes over which a setting-specific SoC contributes to the development of overall SoC.


2019 ◽  
Vol 40 (3) ◽  
pp. 177-185
Author(s):  
Daniela Moza ◽  
Laurențiu Maricuțoiu ◽  
Alin Gavreliuc

Abstract. Previous research established that an independent construal of the self is associated with higher self-esteem, which, in turn, is associated with increased happiness. Regarding the directionality of these relationships, theoretical arguments have suggested that self-construal precedes self-esteem and that self-esteem precedes happiness. However, most research in this area is cross-sectional, thus limiting any conclusions about directionality. The present study tested these relationships in 101 Romanian undergraduates using a 3-wave cross-lagged design with a 6-month time lag between every two waves. Structural equation modeling analyses revealed that self-esteem is an antecedent of both happiness and dimensions of independent self-construal (i.e., consistency vs. variability and self-expression vs. harmony). In other words, one’s positive evaluation of self-worth precedes one’s self-perception as being a happy and independent person. The findings are discussed with respect to the theoretical and practical implications, along with limitations and suggestions for future research.


2011 ◽  
Vol 16 (4) ◽  
pp. 334-342 ◽  
Author(s):  
Viren Swami ◽  
Tomas Chamorro-Premuzic ◽  
Khairul Mastor ◽  
Fatin Hazwani Siran ◽  
Mohammad Mohsein Mohammad Said ◽  
...  

The present study examined conceptual issues surrounding celebrity worship in a Malay-speaking population. In total, 512 Malay and 269 Chinese participants from Malaysia indicated who their favorite celebrity was and completed the Celebrity Attitude Scale (CAS) as well as a range of demographic items. Results showed that the majority of Malay and Chinese participants selected pop stars and movie stars as their favourite celebrities, mirroring findings in Western settings. In addition, exploratory factor analysis revealed a three-factor solution of the CAS that was consistent with previous studies conducted in the West. Structural equation modeling further revealed that participant’s age was negatively associated with celebrity worship and that self-rated attractiveness was positively associated with celebrity worship. Overall, the present results suggest that celebrity worship in Malaysia may be driven by market and media forces, and future research may well be guided by use of the CAS.


Author(s):  
Surajit Bag

The application of multivariate techniques is mainly to expand the researchers explanatory ability and statistical efficiency. The first generation analytical techniques share a common limitation i.e. each technique can examine only a single relationship at a time. Structural Equation Modeling, an extension of several multivariate techniques is the technique popularly used today can examine a series of dependence relationships simultaneously. The purpose of this study is to provide a short review on Structural Equation Modeling (SEM) being used in social sciences research. A comprehensive literature review of article appearing in top journals is conducted in order to identify how often SEM theory is used. Also the key SEM steps have been provided offering potential researchers with a theoretical supported systematic approach that simplify the multiple options with performing SEM.


Electronics ◽  
2021 ◽  
Vol 10 (14) ◽  
pp. 1670
Author(s):  
Waheeb Abu-Ulbeh ◽  
Maryam Altalhi ◽  
Laith Abualigah ◽  
Abdulwahab Ali Almazroi ◽  
Putra Sumari ◽  
...  

Cyberstalking is a growing anti-social problem being transformed on a large scale and in various forms. Cyberstalking detection has become increasingly popular in recent years and has technically been investigated by many researchers. However, cyberstalking victimization, an essential part of cyberstalking, has empirically received less attention from the paper community. This paper attempts to address this gap and develop a model to understand and estimate the prevalence of cyberstalking victimization. The model of this paper is produced using routine activities and lifestyle exposure theories and includes eight hypotheses. The data of this paper is collected from the 757 respondents in Jordanian universities. This review paper utilizes a quantitative approach and uses structural equation modeling for data analysis. The results revealed a modest prevalence range is more dependent on the cyberstalking type. The results also indicated that proximity to motivated offenders, suitable targets, and digital guardians significantly influences cyberstalking victimization. The outcome from moderation hypothesis testing demonstrated that age and residence have a significant effect on cyberstalking victimization. The proposed model is an essential element for assessing cyberstalking victimization among societies, which provides a valuable understanding of the prevalence of cyberstalking victimization. This can assist the researchers and practitioners for future research in the context of cyberstalking victimization.


Assessment ◽  
2021 ◽  
pp. 107319112199876
Author(s):  
Arpita Ghosh ◽  
Christopher R. Niileksela ◽  
Rebecca Janis

The purpose of this study was to examine the factorial invariance of the Counseling Center Assessment of Psychological Symptoms–62 (CCAPS-62) across military background and gender identity. A sample of 2,208 military students and 2,208 nonmilitary students were chosen from a large database of university and college counseling centers. Using exploratory structural equation modeling, findings suggested the CCAPS-62 is mostly invariant across military background and gender identity. Only three item thresholds appeared to be noninvariant across groups. These results suggest comparisons of scores across military background and gender can be made. Latent mean differences across groups were also examined. After controlling for several background variables, there were some differences between males and females on subscales measuring depression, eating concerns, and generalized anxiety, but no differences between military and nonmilitary students. Implications for practice and future research are discussed.


2021 ◽  
Vol 13 (8) ◽  
pp. 4548
Author(s):  
Qingyu Zhang ◽  
Sohail Ahmad

Corporate social responsibility (CSR) in management domains is a well-known concept that links corporate interests and environmental/community values. CSR is considered a strategic policy that offers environmental and social competitive advantages. Organizations consider that CSR-based goodwill provides a tactical competitive edge and sustainable growth. The goal of this paper is to show how CSR programs affect consumers’ purchasing intention in the context of Pakistan. In addition, the effect of customer awareness has been studied as a moderator between CSR and purchasing intention. To this end, the study has conducted a survey and gathered Pakistani customers’ responses, and structural equation modeling has been used to evaluate the results. The study concludes that CSR activities favorably affect customer purchasing intentions directly as well as indirectly through improving brand image and trust, and customer awareness of CSR activities plays a moderating role. The implications and future research directions are discussed.


1997 ◽  
Vol 14 (1) ◽  
pp. 51-64 ◽  
Author(s):  
Georgios D. Sideridis ◽  
Judy P. Chandler

The Teacher Integration Attitudes Questionnaire (TIAQ) was developed in order to assess the attitudes and beliefs of teachers (n = 110) with regard to the inclusion of students with disabilities in regular education settings. Using Structural Equation Modeling, the final structural model of the TIAQ comprised four constructs, namely, “Skills,” “Benefits,” “Acceptance,” and “Support.” The final model was fully supported by the derivation sample of music education teachers (n = 54) and produced a Comparative Fit Index (CFI = 1.00). The replication sample of physical education teachers (n = 56) partially supported the generality of the TIAQ, (CFI = .844). Further, the internal consistency properties of the TIAQ (Cronbach’s alpha was .77 for both samples) were satisfactory. We conclude that the psychometric properties of the TIAQ were adequate, and it can be used as a valid assessment in evaluating the status of inclusion for students with disabilities as perceived by music education and physical education teachers. However, future research is needed to support its generality with other groups of teachers and professionals.


2021 ◽  
pp. 009385482110361
Author(s):  
Ivan Y. Sun ◽  
Yuning Wu ◽  
Smart E. Otu ◽  
Gilbert C. Aro ◽  
Ikechukwu Charles Akor ◽  
...  

Organizational commitment is an imperative aspect of occupational attitudes as it signals employees’ willingness to stay with their organization and effectively achieve collective goals. Although recent studies have assessed factors influencing police officers’ organizational commitment, very little is known about the antecedents of police commitment in African countries. Based on a survey of Nigerian police officers, the study assesses the linkage between organizational justice and organizational commitment directly and indirectly through organizational trust and job satisfaction. Structural equation modeling (SEM) indicates that the relationship between organizational justice and organizational commitment is principally indirect through the mediating mechanisms of supervisory trustworthiness and job satisfaction. Officers who express greater organizational justice report higher trust in their management and supervisors and, subsequently, stronger job satisfaction, leading to higher organizational commitment. Implications for future research and policy are discussed.


2021 ◽  
Vol 13 (9) ◽  
pp. 5104
Author(s):  
Aram Eslamlou ◽  
Osman M. Karatepe ◽  
Mehmet Mithat Uner

An increasing body of research suggests job embeddedness (JE) as a motivational variable influencing employees’ attitudinal and behavioral outcomes such as quitting intentions and task performance. Personal resources have been reported to affect JE and these outcomes. However, little work has investigated the antecedents and consequences of JE among cabin attendants. There is also a dearth of empirical research regarding the mechanism linking resilience to cabin attendants’ affective and performance outcomes. Therefore, drawing on conservation of resources and JE theories, we propose a conceptual model that examines the interrelationships of resilience, JE, career satisfaction (CSAT), and creative performance (CPERF). Moreover, the model explores JE as a mediator of the impact of resilience on CSAT and CPERF. These linkages were tested via data collected from cabin attendants and their pursers. The findings from structural equation modeling reveal that resilience boosts cabin attendants’ JE, CSAT, and CPERF. As predicted, JE is a mediator between resilience and CSAT. Our paper culminates with implications for theory and practice as well as future research directions.


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