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Results for “Structural equation modeling”

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At least 721 records · Page 40Linked to original sources

PubMed2000

Modeling caregiver adaptation over time: the longitudinal impact of behavior problems.

Although cross-sectional research has established the link between care demands and various indicators of caregiver adaptation, few studies have examined the impact of care recipients' problematic behavior over time. The present analysis determines the importance of behavior problems when predicting rates of change in subjective stressors (role overload and role captivity) and depression. Using 4-wave longitudinal data (N = 137) on dementia caregivers, the authors fit individual growth curve models for care demands (i.e., behavior problems, activities of daily living dependencies, and cognitive impairment), subjective stressors, and depression. Subsequent structural equation models found that increases in behavior problems were most likely to predict increases in role overload. The findings emphasize the deleterious long-term impact of behavior problems on individuals' emotional adaptation to caregiving.

Activities of Daily Living↗

PubMed2001

Path model analyzed with ordinary least squares multiple regression versus LISREL.

The data of a specified path model using the variables of voice, perceived organizational support, being heard, and procedural justice were subjected to the two separate structural equation modeling analytic techniques--that of ordinary least squares regression and LISREL. A comparison of the results and differences between the analyses is discussed, with the LISREL approach being stronger from both theoretical and statistical perspectives.

Data Interpretation, Statistical↗

PubMed2002

Psychosocial correlates of sun-protective practices of preschool staff toward their students.

The skin cancer rate in the US has been increasing faster than that for other cancers. Most skin cancers are related to sun exposure and the majority of exposure occurs before adulthood. Thus, children are an important target group to study and preschools can be useful avenues for delivering sun-protection messages. The current study examines the behaviors of preschool staff in protecting students from sun exposure and investigates factors related to sun-protective practice. Preschool staff (n = 245) were surveyed about their sun-protective practices toward students as the cross-sectional baseline measurement for a larger project. The primary aim of this study was to investigate correlates of staff's sun-protective behavior toward students. A theoretical model of psychosocial constructs that combined components of the Theory of Planned Behavior and Social Cognitive Theory was evaluated using structural equation modeling. Self-efficacy and perceived norms were the strongest correlates of behavior. A hypothesized link between expectancy and behavior was not supported. The roles of self-efficacy and perceived norms in the preschool context are discussed as they relate to staffs behavior.

Adult↗

PubMed2001

Measuring cancer patients' psychological distress and well-being: a factor analytic assessment of the Mental Health Inventory.

This study examined the psychometric structure of the Mental Health Inventory (MHI) in 433 cancer patients. Using structural equation modeling, confirmatory factor analyses (CFAs) were conducted. Next, exploratory factor analysis (EFA) was used to explore an alternative MHI factor structure with a randomly chosen subsample. Finally, CFAs were conducted on 6 MHI models with the second subsample. Convergent validity was examined by administering the Positive and Negative Affect Schedule (PANAS) and the Dyadic Adjustment Scale (DAS). The CFAs with the original MHI factor structure indicated inadequate fit, supporting the need to conduct an EFA. Results of the EFA indicated support for a 5-factor solution but numerous differences in item factor loadings. The CFA indicated that the 5-factor correlated model was the best fitting model. Correlations between the PANAS and the DAS with the MHI provided preliminary support for the convergent validity of the MHI. Together, these results indicate that the original MHI factor structure may require modification for use in patients with cancer.

Adult↗

PubMed2002

The theory of reasoned action as a model of marijuana use: tests of implicit assumptions and applicability to high-risk young women.

The theory of reasoned action (TRA) is used to model decisions about substance use among young mothers who became premaritally pregnant at age 17 or younger. The results of structural equation modeling to test the TRA indicated that most relationships specified by the model were significant and in the predicted direction. Attitude was a stronger predictor of intention than norm, but both were significantly related to intention, and intention was related to actual marijuana use 6 months later. Outcome beliefs were bidimensional, and positive outcome beliefs, but not negative beliefs, were significantly related to attitude. Prior marijuana use was only partially mediated by the TRA variables; it also was directly related to intentions to use marijuana and to subsequent use.

Adolescent↗

PubMed2004

Development of the Muscle Dysmorphia Inventory (MDI).

AIM: The development of the 6-factor, 27-item Muscle Dysmorphia Inventory (MDI) was based on Lantz et al. proposed model of characteristics associated with Muscle Dysmorphia. METHODS EXPERIMENTAL DESIGN: quantitative procedures including item-to-total correlations, exploratory and confirmatory factor analyses, and structure equation modeling confirmed the construct validity of the scale. Convergent validity was also tested. SETTING: bodybuilding and powerlifting competition venues, weight training facilities, and university athletic venues. PARTICIPANTS: the 1(st) study consisted of 77 experienced male free weight lifters. The 2(nd) study consisted of 156 male non-competitive bodybuilders and weight lifters and 168 elite level powerlifters and bodybuilders. The 3(rd) study consisted of 151 male and female bodybuilders and weight lifters. MEASURES: each participant completed demographic information, the MDI, Drive for Thinness subscale of the Eating Disorder Inventory, and the Training Dependency subscale of the Bodybuilding Dependence Scale. RESULTS: Reliability estimates (Cronbach's a) ranged from 0.72 to 0.94. Factor loadings in all 3 studies supported the 6-factor structure (size/symmetry, supplement use, exercise dependence, pharmacological use, dietary behavior, and physique protection). Much of the scale validation was focused on construct validity, however, correlations with the MDI's subscales and the Training Dependency subscale of the Bodybuilding Dependence Scale and the Drive for Thinness subscale of the Eating Disorder Inventory provided evidence of convergent validity also. CONCLUSIONS: From these preliminary results, the MDI appears to contribute to the identification of a newly formed disorder by offering a multi-dimensional measure of factors related to Muscle Dysmorphia.

Adult↗

PubMed2001

Impact of structural and psychological empowerment on job strain in nursing work settings: expanding Kanter's model.

OBJECTIVE: In this study, we tested an expanded model of Kanter's structural empowerment, which specified the relationships among structural and psychological empowerment, job strain, and work satisfaction. BACKGROUND: Strategies proposed in Kanter's empowerment theory have the potential to reduce job strain and improve employee work satisfaction and performance in current restructured healthcare settings. The addition to the model of psychological empowerment as an outcome of structural empowerment provides an understanding of the intervening mechanisms between structural work conditions and important organizational outcomes. METHODS: A predictive, nonexperimental design was used to test the model in a random sample of 404 Canadian staff nurses. The Conditions of Work Effectiveness Questionnaire, the Psychological Empowerment Questionnaire, the Job Content Questionnaire, and the Global Satisfaction Scale were used to measure the major study variables. RESULTS: Structural equation modelling analyses revealed a good fit of the hypothesized model to the data based on various fit indices (chi 2 = 1140, df = 545, chi 2/df ratio = 2.09, CFI = 0.986, RMSEA = 0.050). The amount of variance accounted for in the model was 58%. Staff nurses felt that structural empowerment in their workplace resulted in higher levels of psychological empowerment. These heightened feelings of psychological empowerment in turn strongly influenced job strain and work satisfaction. However, job strain did not have a direct effect on work satisfaction. CONCLUSIONS: These results provide initial support for an expanded model of organizational empowerment and offer a broader understanding of the empowerment process.

Adult↗

PubMed1998

Religion, health, and psychological well-being in older adults: findings from three national surveys.

This study examines the impact of religious involvement on health status and psychological well-being using data on older adults from three national probability surveys: the Myth and Reality of Aging (N = 2,797), the Quality of American Life (N = 1,209), and Americans' Changing Lives (N = 1,669) studies. Constructs are measured by single items and indices that vary across data sets. A proposed theoretical model specifies direct effects of religiosity on health and well-being and indirect effects on well-being through health. Analyses consist of structural-equation modeling of confirmed measurement models using weighted least squares estimation in LISREL 8.03. The model is analyzed first as specified and is then rerun controlling for the effects of six exogenous constructs: age, gender, race, marital status, education, and geographical region. Findings reveal excellent overall fit in all three samples and the presence of statistically significant religious effects, notably positive net effects of organizational religiosity, in all three samples. These results build on those of prior studies based mostly on samples limited regionally or methodologically or to particular racial or ethnic groups. This study also underscores the value of replicated secondary data analysis as a strategy for gerontologists seeking to confirm or examine a given structural model. Finally, an agenda is proposed for future research in this area.

Adaptation, Psychological↗

PubMed1998

The genetic epidemiology of schizophrenia in a Finnish twin cohort. A population-based modeling study.

BACKGROUND: The magnitude of heritability of schizophrenia remains controversial, due in part to limitations of estimates derived from index twin pairs exclusively. We applied structural equation modeling in a total population of twins to determine the significance and magnitudes of the genetic and environmental contributions to schizophrenia. METHODS: All monozygotic (1180 male and 1315 female pairs) and same-sex dizygotic (2765 male and 2613 female pairs) twins born from 1940 to 1957 in Finland were screened for nonorganic psychotic disorder diagnoses as recorded on an inpatient or outpatient basis or from an eligibility review for a disability pension. RESULTS: The lifetime prevalence of schizophrenia was 2.0%, with a marginally higher prevalence in men (2.2%) than women (1.8%). Model fitting indicated that 83% of the variance in liability was due to additive genetic factors, and the remaining 17% was due to unique environmental factors. Sex-limitation modeling revealed no evidence of sex-specific genetic effects and no sex difference in the magnitude of heritability. A multiple threshold model incorporating affective and other psychoses as a phenotype intermediate between schizophrenia and no diagnosis was rejected. CONCLUSIONS: In a population-based twin study of schizophrenia, heritability was estimated at 83%, with the remaining variance in liability attributed to environmental factors not shared in common among co-twins. Despite the notable limitation of using diagnoses ascertained through treatment contacts, the heritability estimate in this study is almost identical to those reported in recent studies of index pairs using standardized applications of DSM-III or later criteria.

Adult↗

PubMed2002

Toward a comprehensive developmental model for major depression in women.

OBJECTIVE: Major depression is a multifactorial disorder with many etiologic variables that are interrelated through developmental pathways. The authors used structural equation modeling to generate a developmental model for the etiology of major depression in women. METHOD: Data from 1,942 adult female twins, interviewed up to four times over a 9-year period, were used to construct a developmental model to predict depressive episodes in the year before the most recent interview. Eighteen risk factors in five developmental tiers were considered: 1) childhood (genetic risk, disturbed family environment, childhood sexual abuse, and childhood parental loss), 2) early adolescence (neuroticism, self-esteem, and early-onset anxiety and conduct disorder), 3) late adolescence (educational attainment, lifetime traumas, social support, and substance misuse), 4) adulthood (history of divorce and past history of major depression), and 5) the last year (marital problems, difficulties, and stressful life events). RESULTS: The best fitting model included six correlations and 64 paths, provided an excellent fit to the data, and explained 52% of the variance in liability to episodes of major depression. The findings suggest that the development of risk for major depression in women results from three broad pathways reflecting internalizing symptoms, externalizing symptoms, and psychosocial adversity. CONCLUSIONS: Major depression is an etiologically complex disorder, the full understanding of which will require consideration of a broad array of risk factors from multiple domains. These results, while plausible, should be treated with caution because of problems with causal inference, retrospective recall bias, and the limitations of a purely additive statistical model.

Adult↗

PubMed2001

Development and testing of the patient expectations and satisfaction with prenatal care instrument.

Addressing consumer needs requires the development of a valid means of specifically measuring pregnant women's satisfaction with prenatal care. This study's purpose was to develop items for, to pilot-test, and to examine the structural validity of the Patient Expectations and Satisfaction with Prenatal Care (PESPC) instrument. Extant literature and information obtained from focus groups were used in the development. The PESPC was pilot-tested with a sample of 114 pregnant women receiving prenatal care. To structurally validate the PESPC, data collected from 587 women who participated in a cross-sectional, self-administered survey were used. Structural equation modeling and confirmatory factor analysis were used to develop and cross-validate the PESPC. The PESPC was found to be structurally valid, and the subscales of Expectations and Satisfaction demonstrated acceptable levels of internal consistency.

Adolescent↗

PubMed2005

The Stice model of overeating: tests in clinical and non-clinical samples.

The present study tested the dual pathway model of Stice [. A review of the evidence for a sociocultural model of bulimia nervosa and an exploration of the mechanisms of action. Clinical Psychology Review, 14, 633-661 and . A prospective test of the dual-pathway model of bulimic pathology: mediating effects of dieting and negative affect. Journal of Abnormal Psychology, 110, 124-135.] in a non-clinical sample of female adolescents and a clinical sample of female eating disorder patients. The model assumes that negative affect and restrained eating mediates the link between body dissatisfaction and overeating. We also tested an extended version of the model postulating that negative affect and overeating are not directly related, but indirectly through lack of interoceptive awareness and emotional eating. Structural equation modelling was used to test our models. First, in the two samples, body dissatisfaction and drive for thinness were associated with overeating/binge eating. In both clinical and adolescent sample, we found support for the negative affect pathway and not for the restraint pathway. Lack of interoceptive awareness and emotional eating appear to (partly) explain the association between negative affect and overeating. Emotional eating was much more strongly associated with overeating in the clinical than in the adolescent sample. In sum, we found substantial evidence for the negative affect pathway in the dual pathway model. The link between body dissatisfaction and overeating in this respect might be explained by the fact that negative affect, due to body dissatisfaction, is related to a lack of awareness of personal feelings and to eating when dealing with negative emotions, which on its turn is associated with overeating.

Adolescent↗

PubMed1991

A general approach to testing multifaceted personality constructs.

Some personality characteristics are composed of multiple, distinct subcomponents (e.g., Type A, hardiness, attributional style, self-monitoring). The advantages and disadvantages of 3 typical approaches to testing these constructs are reviewed. An alternative approach based on structural equation modeling is then offered. This approach has many advantages over its alternatives, including the provision of an explicit test of the structure of the multifaceted construct, the simultaneous test of the effects of this general construct and the unique aspects of its subcomponents, and the explicit consideration of measurement error. Although the modeling approach does have limitations, these limitations are equally applicable to all of its alternatives. Indeed, the principal disadvantages of the modeling approach seem to be its statistical complexity and the lack of education regarding its proper use.

Adaptation, Psychological↗

PubMed2005

It takes two to tango: personal and organizational resilience as predictors of strain and cardiovascular disease risk in a work sample.

In a cross-sectional sample of 428 employees, the job demand-control-support and effort-reward imbalance job stress models were amalgamated and expanded to include modifiable risk factors and noncontrollable genetic factors related to cardiovascular disease (CVD) risk. With structural equation modeling, the constructs of lack of job resilience, lack of personal resilience, and job demand were used to examine how employer and employee factors related to psychosomatic strain and risk indicators of CVD. Negative perception of job demand predicted perception of lack of job resilience but not lack of personal resilience. Lack of job and personal resilience predicted strain. Women reported greater strain than men. CVD risk was predicted by strain, age, sex, and family history.

Adaptation, Physiological↗

PubMed2001

Antiunion and prounion attitudes as predictors of college students' willingness to join a union.

The authors proposed a model of antiunion attitudes and prounion attitudes as predictors of American college students' willingness to join a union (N = 1,245). Structural equation modeling results indicated that antiunion and prounion attitudes are moderately related and both show similar strength in predicting willingness to join. In addition, a general antiunion factor is shown to underlie specific antiunion attitudes, whereas items related to prounion attitudes are shown to reflect a general prounion factor. The utility of the model was supported based on initial and cross-validation samples (ns = 623 and 622, respectively). Implications for measuring union attitudes and recruiting union members among college-educated workers are discussed.

Adolescent↗

PubMed2003

Racial bias in the assessment of cognitive functioning of older adults.

This study was undertaken to determine if the difference in assessed cognition between Black/African-American and White older adults was due differential item functioning (DIF) and/or differences in the effect of background variables. Participants were 15257 adults aged 50 and older surveyed in the Study of Asset and Health Dynamics of the Oldest Old (AHEAD) and Health and Retirement Study (HRS). The cognitive measure was a modified telephone interview for cognitive status. The analytic strategy was a multiple group structural equation model grounded in item response theory. Results suggest that most (89%) of the group difference could be attributed to measurement or structural differences, the remainder being not significantly different from zero (p=0.193). Most items displayed racial DIF, accounting for most of the group difference. After controlling for DIF, the group difference that remained could be attributed to heterogeneity in the effect of background variables. For example, low education was more deleterious for Black/African-Americans, and high income conferred an advantage only for Whites. These findings underscore the importance of efforts to generate culture-fair measurement devices. However, culture-fair assessments may attenuate, but not eliminate, group differences in assessed cognition due to the incommensurate action of background variables

Black or African American↗

PubMed2000

Psychological determinants of financial preparedness for retirement.

PURPOSE: Economists predict that in the coming decades an unprecedented number of American baby boomers will enter retirement lacking adequate resources. The present investigation was designed to examine the factors that influence individuals' financial preparedness for retirement. DESIGN AND METHODS: A total of 230 participants each completed a multifaceted questionnaire on their own personal retirement planning practices. Structural equation modeling techniques were used to examine the relationships among individuals' personality characteristics, their financial knowledge, and financial preparedness. RESULTS: The adopted structural model revealed that both personality constructs and financial knowledge were significant predictors of pre-retirement planning. IMPLICATIONS: The findings from this study have important implications for how educational and marketing efforts should be developed for individuals who are differentially prone toward saving.

Adaptation, Psychological↗

PubMed1995

Willingness for treatment as a predictor of retention and outcomes.

Retention in drug treatment is important to successful outcomes. The purpose of this study was to test assumptions made in the development and implementation of the ASSET project. The three assumptions were that living conditions of the homeless adult drug user influence willingness for treatment; willingness relates to treatment tenure; and, conditions, willingness and time in treatment influence treatment outcomes. Data on alcohol use, drug use, employment and housing as well as motivation, readiness and suitability of treatment were collected from 494 homeless adults at baseline and at follow-up. Data were subjected to multivariate causal analysis using factor analytic structural equations modeling. Practical fit indices were acceptable. The measurement model confirmed a higher order construct labelled willingness encompassing motivation, readiness and suitability. The structural model demonstrated that willingness positively related to treatment tenure; willingness positively influenced change in drug use and housing; and, tenure related positively to change in housing.

Adult↗