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Results for “Structural equation modeling”

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PubMed2004

Resilience to risk-taking behaviors in impoverished African American girls: the role of mother-daughter connectedness.

Rates of risk behaviors (e.g., violence, substance use) for impoverished girls are exceedingly high. Some view their future pessimistically, decreasing their resilience to avoid risky behaviors. Others resist such behaviors. Connectedness with an adult promotes this resilience, but how is unclear. The purpose of this secondary analysis was to investigate the relationships among connectedness to mother, time perspective, and resilience to risk-taking behaviors in impoverished African American girls ages 11-15. Structural equation modeling was used to cross-validate this model. In contrast to the results found in earlier studies, no direct relationship emerged between maternal connectedness and resilience. Instead, future time perspective was the key mediator between connectedness and resilience. These findings suggest that an important aspect of interventions to foster resilience to risk behaviors in young girls could be to assist their mothers in developing a connected relationship with their daughters that would promote a future time perspective.

Adolescent↗

PubMed2005

Nurses' intention to report child abuse in Taiwan: a test of the theory of planned behavior.

The purposes of this study were to identify factors associated with nurses' intention to report suspected child abuse in Taiwan, and to determine the empirical adequacy of the extended theory of planned behavior (TPB) to explain nurses' intention to report child abuse. A stratified quota sampling technique was used to select registered nurses in emergency rooms, psychiatric units, and pediatric units in Taiwan. A total of 1,362 questionnaires from 1,617 nurses were used for the analyses. Structural equation modeling demonstrated that nurses' attitudes toward reporting child abuse, perceived behavioral control, subjective norms, and knowledge of the child abuse and reporting law explained 85% to 91% of the variance in nurses' intention to report child abuse for the less severe and severe child abuse cases in vignettes, respectively. The findings support the use of the extended TPB in identifying factors associated with nurses' intention to report child abuse in Taiwan.

Adult↗

PubMed2006

Acculturation, social alienation, and depressed mood in midlife women from the former Soviet Union.

Level of acculturation has been linked to depressed mood in studies across culturally diverse immigrant groups. The purpose of this study was to determine the effects of acculturation, social alienation, personal and family stress, and demographic characteristics on depressed mood in midlife immigrant women from the former Soviet Union. Structural equation modeling showed that higher acculturation scores, measured by English language and American behavior, were indirectly related to lower scores for depressed mood. Higher acculturation levels promoted mental health indirectly by reducing social alienation and, subsequently, lowering family and personal stress, both of which had direct relationships to symptoms of depression. These findings support the ecological framework that guided our research and point to the importance of focusing on contextual factors in developing interventions for new immigrants.

Acculturation↗

PubMed2006

Gender differences in caregiving stress among caregivers of cancer survivors.

Despite a growing body of research on male caregivers, limited information is available on male caregivers of cancer survivors. Furthermore, few studies have examined the unique contribution of caregiver esteem as well as care-recipient's functional status as potential mediators of the link between gender and caregiving stress. Thus, the present study examines how the caregiver's perception of providing care to a spouse with cancer differs by gender. The proposed mediators, caregiver's esteem and care-recipient's psychosocial and physical functioning, were tested simultaneously, utilizing structural equation modeling. Results revealed that both caregiver's esteem and care-recipient's psychosocial functioning were significant mediators, but in different directions. Specifically, husband caregivers reported higher caregiver's esteem, which resulted in reporting less stress from providing care to their wife with cancer. On the other hand, when husband caregivers provided care to their wife with poorer psychosocial functioning, they reported greater stress from caregiving. Husband caregivers will benefit from programs designed to educate them to effectively assist their wife's psychosocial adjustment to cancer by reducing their stress from providing care.

Adult↗

PubMed2007

Optimism and life events as predictors of fear appraisals in mothers of children undergoing hematopoietic stem cell transplantation.

Although mothers' fear appraisals about their child's future health and well-being affect their own psychological adjustment to their child's hematopoietic stem cell transplantation (HSCT), little is known about antecedents of maternal fear appraisals. This longitudinal study investigated several potential antecedents of these fear appraisals: maternal optimism, recent negative life events, lifetime history of traumatic events, and medical characteristics of the child's disease and HSCT course. One hundred-forty mothers were interviewed during their child's hospitalization for HSCT and at 3-and 6-months post-HSCT. Structural equation modeling was used to test a model of hypothesized relations. Consistent with predictions, lower optimism and a greater number of negative life events were independently associated with greater maternal fear appraisals. Contrary to expectations, lifetime history of trauma was not associated with maternal fear appraisals. Mothers' fear appraisals during their child's hospitalization were, in turn, associated with their fear appraisals up to 6 months later. These data identify a subset of mothers who may be particularly in need of an intervention to increase optimistic coping strategies, improve coping with negative life events, and reduce fear appraisals to improve their adjustment following their child's HSCT.

Adolescent↗

PubMed2007

Passive coping and psychological distress in women adhering to regular breast cancer surveillance.

Since 2000 the MRISC study evaluates the psychological consequences of regular breast cancer surveillance for women at increased risk for hereditary breast cancer. Coping style may influence these psychological consequences. In a cohort of 357 women at increased risk for hereditary breast cancer, the impact of coping styles on the course, divided into level and trend of psychological distress (general and breast cancer specific) was examined, around two consecutive surveillance appointments. With structural equation modelling we found passive coping to be associated with higher levels of both general and breast cancer specific distress. Seeking social support, expression of emotions and thinking comforting thoughts were associated with lower levels of psychological distress. Coping style was not associated with the trend of psychological distress around the two surveillance appointments. It is recommendable to take coping styles into account when counselling these high-risk women.

Adaptation, Psychological↗

PubMed2006

The Mini-Mental Adjustment to Cancer (Mini-MAC) scale: construct validation with a Greek sample of breast cancer patients.

This investigation is a Greek validation of the Mini-Mental Adjustment to Cancer (Mini-MAC) scale, an instrument derived from the MAC and designed to measure styles of coping with cancer. A sample of 225 women diagnosed with breast cancer completed this questionnaire. Statistical analyses using structural equation modeling (SEM) confirmed Watson's original five first-order factors underlying Mini-MAC items: Helplessness/Hopelessness (HH), Anxious Preoccupation (AP), Fighting Spirit (FS), Avoidance (AV) and Fatalism (F). On a higher-order level, SEM and Multidimensional Scaling revealed two second-order factors: adaptive coping (being measured by FS, AV, and F) and maladaptive coping (being measured by HH and AP). Results are discussed in terms of the theoretical framework needed to account for the relationships among Mini-MAC factors and the refinement of the applications of SEM in the study of the mental adjustment to cancer construct.

Adaptation, Psychological↗

PubMed2003

Examination of movement in patients with long-lasting musculoskeletal pain: reliability and validity.

BACKGROUND AND PURPOSE: An examination method based on psychosomatic physiotherapy, with 24 standardized tests related to general aspects of mobility, flexibility and the ability to relax, is used in some pain and rehabilitation clinics in Scandinavia in order to document where--and to what degree--patients have aberrations within the domain 'movement'. The measurement properties of the movement tests have, however, not been investigated in patients with long-lasting musculoskeletal pain. The aims of the present study were, therefore, to investigate inter-tester reliability and validity (construct, discriminative and concurrent validity) related to movement. METHOD: The study design was cross-sectional. Reliability was examined by three physiotherapists examining 19 people. Construct validity was studied by means of structural equation modelling (SEM). Discriminative validity was examined by comparing movement data from 247 patients with long-lasting musculoskeletal pain, and 104 healthy subjects. The patient sample was categorized according to localized or widespread pain, and movement scores compared between the groups. Most patients filled in a psychological screening questionnaire (MMPI-2), plus information about pain intensity and function, and concurrent validity of the movement measures were examined by correlation. RESULTS: SEM results indicated a modified movement scale, consisting of 16 items in four subscales. Both the original and modified versions showed good reliability, and scores differed significantly between healthy subjects and patients, and between patients with localized versus widespread pain. A relationship was found between the movement tests and psychological characteristics, but mainly in patients with widespread pain. Significant relationships were found between the ability to relax and pain, and between all aspects of movement and function. CONCLUSIONS: Movement may be reliably and validly assessed with composite scores from 4 x 4 items. The method may be useful as a global screening instrument in order to examine where, and to what extent, patients with long-lasting pain problems have movement aberrations; findings to be addressed in treatment.

Adult↗

PubMed1998

Perceived social support and abdominal fat distribution in adolescents and young adults: a structural equation analysis of prospective data.

We prospectively examined the relationship between perceived social support and abdominal fat distribution. A 3-year follow-up study of 235 randomly selected healthy adolescents and young adults was used. Abdominal fat distribution was measured by means of the waist to hip circumference ratio (WHR), and social support was measured by the Perceived Social Support Scale-Revised. Data were analysed using structural equation models. Changes in social support were inversely associated with changes in WHR, adjusted for body-mass index, among boys and men. This association was less evident among girls and women. The relationship of social support with WHR was independent of depression and hostility. The findings suggest that social support may protect against abdominal fat accumulation, thereby potentially decreasing the risk of coronary heart disease later in life.

Abdomen↗

PubMed2002

Auditory temporal processing deficits in children with periventricular brain injury.

The present study investigated whether auditory temporal processing deficits are related to the presence and/or the severity of periventricular brain injury and the reading difficulties experienced by extremely low birthweight (ELBW: birthweight <1000 g) children. Results indicate that ELBW children with mild or severe brain lesions obtained significantly lower scores on a test requiring auditory temporal order judgments than ELBW children without periventricular brain injury or children who were full-term. Structural equation modeling indicated that a model in which auditory temporal processing deficits predicted speech sound discrimination and phonological processing ability provided a better fit for the data than did a second model, which hypothesized that auditory temporal processing deficits are associated with poor reading abilities through a working memory deficit. These findings suggest that an impairment in auditory temporal processing may contribute to the reading difficulties experienced by ELBW children.

Adolescent↗

PubMed1998

The Big Five Personality Dimensions and the Process of Institutional Departure.

This study investigated the role of the "Big Five" personality dimensions in the dynamics of institutional departure in a convenience sample of 240 first-time, first-semester students enrolled in Introduction to Psychology at a large southwestern state university. Of the "Big Five" dimensions (agreeableness, conscientiousness, extraversion, neuroticism, and openness to experience), structural equation modeling revealed that conscientiousness exhibited the largest total effect on institutional departure (-.293). Conscientiousness exerted indirect effects (-.133) on institutional departure via organizational involvement, initial institutional commitment, and cumulative GPA as well as a direct effect (-.160) on institutional departure. Only 14 of the 240 students departed the institution within 1 year. A discriminant function analysis of institutional persistence versus departure, using cumulative GPA, institutional commitment, and conscientiousness as predictors, yielded a high false positive rate (67.6%) and a high sensitivity rate (78.6%). Copyright 1998 Academic Press.

Journal Article↗

PubMed1997

Item-Specific Efficacy Judgments in Mathematical Problem Solving: The Downside of Standing Too Close to Trees in a Forest

Educational researchers assess self-efficacy by asking students to rate their capability of succeeding at specific target tasks (e.g., math test items) and then testing their performance to actually solve similar test items. Pajares and colleagues (Pajares & Kranzler, 1995; Pajares & Miller, 1994, 1995, in press) argued for the use of identical items to assess self-efficacy and performance in order to maximize self-efficacy's predictive power. In two studies, structural equation models (SEM) demonstrated that this variation led to positively biased estimates of paths from self-efficacy to performance and negatively biased estimates of paths from self-concept to performance. Whereas corrections for this bias did not substantially alter the size of effects or substantive interpretations, results from both studies were consistent with a priori predictions about the nature of this bias. Researchers are encouraged to use similar but not identical items to assess self-efficacy and performance, a construct validity approach to interrogate their interpretations, more diverse outcome measures, and SEM approaches like those demonstrated here.

Journal Article↗

PubMed2001

Preservice Teachers' Self-Esteem and Mathematics Achievement.

The purpose of this article is to examine the relationship between preservice teachers' general self-esteem and mathematics achievement through the inclusion of variables that are supported by recent research in psychology and social cognitive theory. A structural equation model is used to examine the paths from mathematics achievement to general self-esteem and vice versa. To this end, the concepts of self-esteem and the relationships between self-esteem and academic achievement are first explained, followed by a description of the baseline model that was used for the analysis of the data. The methodology of the study, with emphasis on the description of the intervening variables, is then summarized. Last, the results of the study are discussed and conclusions are drawn from the main findings. Copyright 2001 Academic Press.

Journal Article↗

PubMed2000

The unity and diversity of executive functions and their contributions to complex "Frontal Lobe" tasks: a latent variable analysis.

This individual differences study examined the separability of three often postulated executive functions-mental set shifting ("Shifting"), information updating and monitoring ("Updating"), and inhibition of prepotent responses ("Inhibition")-and their roles in complex "frontal lobe" or "executive" tasks. One hundred thirty-seven college students performed a set of relatively simple experimental tasks that are considered to predominantly tap each target executive function as well as a set of frequently used executive tasks: the Wisconsin Card Sorting Test (WCST), Tower of Hanoi (TOH), random number generation (RNG), operation span, and dual tasking. Confirmatory factor analysis indicated that the three target executive functions are moderately correlated with one another, but are clearly separable. Moreover, structural equation modeling suggested that the three functions contribute differentially to performance on complex executive tasks. Specifically, WCST performance was related most strongly to Shifting, TOH to Inhibition, RNG to Inhibition and Updating, and operation span to Updating. Dual task performance was not related to any of the three target functions. These results suggest that it is important to recognize both the unity and diversity of executive functions and that latent variable analysis is a useful approach to studying the organization and roles of executive functions.

Cognition↗

PubMed1997

Pathways of lead exposure in urban children.

A linear structural equation modeling procedure was used to explore the mechanisms and pathways for lead intake among urban children and the relative contribution of various lead sources to lead-contaminated house dust. Dust lead levels were significantly associated with children's blood lead levels, both indirectly and directly via hand lead. Both soil and paint lead contributed to dust lead levels, but paint contributed significantly more lead to house dust than soil (P < 0.001). Black race and income level both directly affected children's blood lead levels. Finally, time spent outdoors was associated with children putting soil or dirt in their mouths which was, in turn, associated with children's blood lead levels. These data indicate that mouthing behaviors are an important mechanism of exposure among urban children with low-level elevations in blood lead and that lead-based paint is a more important contributor of lead to house dust than is lead-contaminated soil.

Dust↗

PubMed1998

Changes in airborne lead particulate in port pirie, South Australia, 1986-1996.

Port Pirie is 230 km north of Adelaide, the capital of South Australia. The major industry in the city is a lead smelter owned by Pasminco. Fume, dust, and fugitive emissions from the smelter have been deposited in and around Port Pirie over the past 100 years. The results presented in this paper are from an air monitoring station situated at the southeast entrance of the smelter, approximately 600 m from the blast furnace. Measurements include total suspended particulate (TSP) and total suspended particulate lead (TSPL) reported as concentrations (microgram/m3). Data are available from 1986 to 1996 and consist of 548 measurements. Analysis of geometric mean concentration levels by wind direction showed that while for TSP there was little relationship with wind direction, TSPL increased substantially as the wind came from the direction of the smelter. An analysis of geometric mean concentration levels by wind speed showed that TSP was significantly correlated with wind speed for all wind sectors apart from winds coming from the smelter production area. The lack of correlation between TSP and wind speed when the wind blows from the direction of the smelter is probably due to the dilution effect of particulate from a point source as wind speed increases. TSPL was significantly correlated with wind speed for all wind sectors apart from winds coming from the city. As expected, both TSP and TSPL concentrations were significantly lower on days when rain fell. Both mean geometric TSP and TSPL concentrations were lower in the period 1993-1996 than in 1986-1992. Multiple linear regression analysis was used to demonstrate that this decline was statistically significant after adjusting for weather conditions. Wind directions were divided into four sectors: winds from the smelter production area; winds from the smelter nonproduction area; winds from the zinc wharf and east of the city; and winds from the city. Structural equation models for each sector were used to demonstrate that the decline in geometric mean TSPL concentrations over the two periods were of a similar order of magnitude for all four sectors. The relevance of this to the lead abatement programs that have been undertaken both within the city of Port Pirie and inside the smelter itself is discussed.

Air Pollutants↗

PubMed2000

Maternal bone lead contribution to blood lead during and after pregnancy.

We examined bone lead contribution to blood lead in a group of 311 immigrant women, 99% from Latin America, during the third trimester of pregnancy and 1 to 2 months after delivery. We measured in vivo tibia and calcaneus (heel) bone lead concentration in the postdelivery period with K shell X-ray fluorescence. Prenatal and postnatal geometric mean (range) blood lead level was 2.2 microg/dL (0.4 to 38.7) and 2.8 microg/dL (0.4 to 25.4), reflecting low current exposure. Postnatal blood lead level was significantly higher than prenatal (P<0.0001). Mean (range) tibia and calcaneus lead concentration was 6.7 microg/g (-33.7 to 62.2) and 8.4 microg/g (- 30.1 to 66.4), reflecting varying but elevated past lead exposure. Mean calcaneus lead concentration was significantly higher than mean tibia lead concentration (P = 0.055). Variance-weighted multiple regression and structural equation models showed that both calcaneus and tibia lead were directly associated with prenatal blood lead but only calcaneus lead was associated with postnatal blood lead. Increasing natural log years in the United States independently predicted decreasing calcaneus and third-trimester blood lead. The data suggest that while some exogenous lead sources and modulators of blood lead level, such as use of lead-glazed pottery and calcium in the diet, control lead exposure during and after pregnancy, endogenous lead sources from past exposure before immigration continue to influence blood lead levels in this sample.

Adolescent↗

PubMed1996

Family influences on self-reported delinquency among high school students

We investigated the links between perceived family relationships, parental discipline style, locus of control, self-esteem and self-reported delinquency among 177 Australian teenagers. The prediction that locus of control and self-esteem would mediate the effects of family process on delinquency was tested using structural equation modelling. Although there appeared to be a good fit between the data and the proposed model, the amount of variance explained by the predictor variables was not large. Among females, the best predictor of low levels of self-reported delinquency was an inductive discipline style, whilst for males high levels of self-reported delinquency were best predicted by a punitive discipline style. Among males, positive family relations was a significant predictor of high self-esteem. No mediating effects of self-esteem and locus of control were observed. The findings are discussed with reference to previous research, and some implications for clinical practice are also noted.

Journal Article↗