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Structural equation modeling

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https://www.readbyqxmd.com/read/28441647/subjective-memory-in-a-national-sample-predicting-psychological-well-being
#1
Jacqueline A Mogle, Nikki Hill, Caroline McDermott
BACKGROUND: Individual perception of memory performance (i.e., subjective memory) is assessed using a variety of approaches. This article focuses on 2 such approaches: (1) self-comparison assessments that attempt to capture changes in memory ability over a period of time and (2) age-anchored comparisons that assess how an individual perceives their memory in relation to others their age. These different types of assessment may relate to psychological well-being differently due to the underlying mechanisms of assessment...
April 26, 2017: Gerontology
https://www.readbyqxmd.com/read/28440866/a-prospective-comparison-of-how-the-level-of-response-to-alcohol-and-impulsivity-relate-to-future-dsm-iv-alcohol-problems-in-the-coga-youth-panel
#2
Marc A Schuckit, Tom L Smith, George Danko, Robert Anthenelli, Lara Schoen, Mari Kawamura, John Kramer, Danielle M Dick, Zoe Neale, Samuel Kuperman, Vivia McCutcheon, Andrey P Anokhin, Victor Hesselbrock, Michie Hesselbrock, Kathleen Bucholz
BACKGROUND: Alcohol problems reflect both environmental and genetic characteristics that often operate through endophenotypes like low levels of response (low LRs) to alcohol and higher impulsivity. Relationships of these preexisting characteristics to alcohol problems have been studied, but few analyses have included both low LR and impulsivity in the same model. METHODS: We extracted prospective data from 1,028 participants in the Prospective Youth Sample of the Collaborative Study for the Genetics of Alcoholism (COGA)...
April 25, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28440010/self-concept-mediates-the-relation-between-achievement-and-emotions-in-mathematics
#3
Jojanneke P J Van der Beek, Sanne H G Van der Ven, Evelyn H Kroesbergen, Paul P M Leseman
BACKGROUND: Mathematics achievement is related to positive and negative emotions. Pekrun's control-value theory of achievement emotions suggests that students' self-concept (i.e., self-appraisal of ability) may be an important mediator of the relation between mathematics achievement and emotions. AIMS: The aims were (1) to investigate the mediating role of mathematical self-concept in the relation between mathematics achievement and the achievement emotions of enjoyment and anxiety in a comprehensive model, and (2) to test possible differences in this mediating role between low-, average-, and high-achieving students...
April 25, 2017: British Journal of Educational Psychology
https://www.readbyqxmd.com/read/28439764/covariance-model-simulation-using-regular-vines
#4
Steffen Grønneberg, Njål Foldnes
We propose a new and flexible simulation method for non-normal data with user-specified marginal distributions, covariance matrix and certain bivariate dependencies. The VITA (VIne To Anything) method is based on regular vines and generalizes the NORTA (NORmal To Anything) method. Fundamental theoretical properties of the VITA method are deduced. Two illustrations demonstrate the flexibility and usefulness of VITA in the context of structural equation models. R code for the implementation is provided.
April 24, 2017: Psychometrika
https://www.readbyqxmd.com/read/28438248/program-factor-at-10-origins-development-and-future-directions
#5
Pere J Ferrando, Urbano Lorenzo-Seva
BACKGROUND: We aim to provide a conceptual view of the origins, development and future directions of FACTOR, a popular free program for fitting the factor analysis (FA) model. METHOD: The study is organized into three parts. In the first part we discuss FACTOR in its initial period (2006-2012) as a traditional FA program with many new and cutting-edge features. The second part discusses the present period (2013-2016) in which FACTOR has developed into a comprehensive program embedded in the framework of structural equation modelling and item response theory...
May 2017: Psicothema
https://www.readbyqxmd.com/read/28438243/factors-which-motivate-the-use-of-social-networks-by-students
#6
Mercedes González Sanmamed, Pablo C Muñoz Carril, Isabel Dans Álvarez de Sotomayor
BACKGROUND: The aim of this research was to identify those factors which motivate the use of social networks by 4th year students in Secondary Education between the ages of 15 and 18. METHOD: 1,144 students from 29 public and private schools took part. The data were analysed using Partial Least Squares Structural Equation Modelling technique. RESULTS: Versatility was confirmed to be the variable which most influences the motivation of students in their use of social networks...
May 2017: Psicothema
https://www.readbyqxmd.com/read/28438242/depression-and-aggressive-behaviour-in-adolescents-offenders-and-non-offenders
#7
Anna Llorca Mestre, Elisabeth Malonda, Paula Samper-García
BACKGROUND: Adolescent behaviour is strongly linked to emotions. The aim of this study is 1) analyse the differences between young offenders and non-offenders in emotional instability, anger, aggressive behaviour, anxiety and depression, and also the differences according to sex; and 2) compare the relation between emotional instability and anxiety, depression and aggressive behaviour mediated or modulated by anger in both groups. METHOD: participants are 440 adolescents, both male and female (15-18 years old)...
May 2017: Psicothema
https://www.readbyqxmd.com/read/28438240/an-explanatory-model-of-maths-achievement-perceived-parental-involvement-and-academic-motivation
#8
Susana Rodríguez, Isabel Piñeiro, Mª L Gómez-Taibo, Bibiana Regueiro, Iris Estévez, Antonio Valle
BACKGROUND: Although numerous studies have tried to explain performance in maths very few have deeply explored the relationship between different variables and how they jointly explain mathematical performance. METHOD: With a sample of 897 students in 5th and 6th grade in Primary Education and using structural equation modeling (SEM), this study analyzes how the perception of parents’ beliefs is related to children´s beliefs, their involvement in mathematical tasks and their performance...
May 2017: Psicothema
https://www.readbyqxmd.com/read/28437850/public-perception-of-uncertainties-within-climate-change-science
#9
Vivianne H M Visschers
Climate change is a complex, multifaceted problem involving various interacting systems and actors. Therefore, the intensities, locations, and timeframes of the consequences of climate change are hard to predict and cause uncertainties. Relatively little is known about how the public perceives this scientific uncertainty and how this relates to their concern about climate change. In this article, an online survey among 306 Swiss people is reported that investigated whether people differentiate between different types of uncertainty in climate change research...
April 24, 2017: Risk Analysis: An Official Publication of the Society for Risk Analysis
https://www.readbyqxmd.com/read/28437763/depression-and-insomnia-as-mediators-of-the-relationship-between-distress-and-quality-of-life-in-cancer-patients
#10
Kyeong Min Cha, Young Ki Chung, Ki Young Lim, Jae Sung Noh, Mison Chun, So Yeon Hyun, Dae Ryong Kang, Min Jung Oh, Nam Hee Kim
BACKGROUND: Distress in cancer patients leads to poorer quality of life (QOL) and negatively impacts survival. For efficient management of a patient's disease course, the interrelationships among distress, depression, insomnia, and QOL must be understood. This study aimed to investigate whether depression and insomnia mediate the relationship between distress and QOL in cancer patients. METHODS: Cancer patients referred to a specialized psycho-oncology clinic (n=208) participated in this study...
April 17, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28437693/an-assessment-of-the-social-cognitive-predictors-of-exclusive-breastfeeding-behavior-using-the-health-action-process-approach
#11
J L Martinez-Brockman, F M Shebl, N Harari, R Pérez-Escamilla
RATIONALE: In the United States rates of exclusive breastfeeding duration remain exceedingly low. Exclusive breastfeeding is a complex learned behavior that is influenced by social cognitive, interpersonal, and structural factors. Interventions are needed that address factors at multiple levels of the social-ecological model. This study was designed to examine the social cognitive predictors of exclusive breastfeeding behavior in a sample of low-income women attending the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) breastfeeding peer counseling program and enrolled in the Lactation Advice Through Texting Can Help (LATCH) study...
April 12, 2017: Social Science & Medicine
https://www.readbyqxmd.com/read/28437681/predicting-wellbeing-among-people-with-epilepsy-using-illness-cognitions
#12
Kirstie A Salter, Kirsty N Prior, Malcolm J Bond
OBJECTIVE: This study sought to examine the synergistic contribution of illness-related perceptions (stigma, severity, and threat) and illness behavior to wellbeing among people with epilepsy. Poorer wellbeing was expected among those who perceived greater stigma, illness severity, and threat and had more extreme illness behavior. METHODS: Individuals with a diagnosis of epilepsy (N=210), recruited through local and online support groups, completed a questionnaire comprising demographic and epilepsy-specific information, and validated measures of illness perceptions and behavior, epilepsy-related quality of life, and general psychological health...
April 21, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28437379/associations-of-lifetime-trauma-and-chronic-stress-with-c-reactive-protein-in-adults-ages-50-and-older-examining-the-moderating-role-of-perceived-control
#13
Ari J Elliot, Christopher J Mooney, Frank J Infurna, Benjamin P Chapman
OBJECTIVE: To investigate whether high perceived control mitigates systemic inflammatory risk associated with traumatic and chronic stress exposures in older adults. METHODS: A sample of community-dwelling adults ages 50 and older (N=4,779) was drawn from the Health and Retirement Study (HRS). Structural equation models tested interactions of lifetime trauma and chronic stress with mastery and perceived constraints predicting baseline levels and four-year change in C-reactive protein (CRP)...
April 21, 2017: Psychosomatic Medicine
https://www.readbyqxmd.com/read/28436732/administrative-license-suspension-does-length-of-suspension-matter
#14
James C Fell, Michael Scherer
OBJECTIVE: Administrative license revocation (ALR) laws, which provide that the license of a driver with a blood alcohol concentration at or over the illegal limit is subject to an immediate suspension by the state department of motor vehicles, are an example of a traffic law in which the sanction rapidly follows the offense. The power of ALR laws has been attributed to how swiftly the sanction is applied, but does the length of suspension matter? Our objectives were to (a) determine the relationship of the ALR suspension length to the prevalence of drinking drivers relative to sober drivers in fatal crashes and (b) estimate the extent that the relationship is associated to the general deterrent effect compared to the specific deterrent effect of the law...
February 10, 2017: Traffic Injury Prevention
https://www.readbyqxmd.com/read/28436272/moderation-of-the-effects-of-discrimination-induced-affective-responses-on-health-outcomes
#15
Meg Gerrard, Frederick X Gibbons, Mary E Fleischli, Carolyn E Cutrona, Michelle L Stock
OBJECTIVE: The goal of the study was to examine differential mediation of long-term effects of discrimination on health behaviour and health status by internalising (anxiety and depression) and externalising (hostility and anger), and to explore moderation of these effects, specifically, by the presence of support networks and coping tendencies. DESIGN: The current analyses employed structural equation modelling of five waves of data from Black female participants of the Family and Community Health Study over 11 years (M age 37-48)...
April 23, 2017: Psychology & Health
https://www.readbyqxmd.com/read/28434893/what-makes-people-leave-their-food-the-interaction-of-personal-and-situational-factors-leading-to-plate-leftovers-in-canteens
#16
Bettina Anne-Sophie Lorenz, Monika Hartmann, Nina Langen
In order to provide a basis for the reduction of food losses, our study analyzes individual food choice, eating and leftover behavior in a university canteen by consideration of personal, social and environmental determinants. Based on an extended literature review, a structural equation model is derived and empirically tested for a sample of 343 students. The empirical estimates support the derived model with a good overall model fit and sufficient R(2) values for dependent variables. Hence, our results provide evidence for a general significant impact of behavioral intention and related personal and social determinants as well as for the relevance of environmental/situational determinants such as portion sizes and palatability of food for plate leftovers...
April 20, 2017: Appetite
https://www.readbyqxmd.com/read/28434717/relative-genetic-and-environmental-contributions-to-variations-in-human-retinal-electrical-responses-quantified-in-a-twin-study
#17
Taha Bhatti, Ambreen Tariq, Ting Shen, Katie M Williams, Christopher J Hammond, Omar A Mahroo
PURPOSE: To estimate heritability of parameters of human retinal electrophysiology and to explore which parameters change with age. DESIGN: Prospective, classic twin study. PARTICIPANTS: Adult monozygotic and dizygotic twin pairs recruited from the TwinsUK cohort. METHODS: Electroretinogram responses were recorded using conductive fiber electrodes in response to stimuli incorporating standards set by the International Society for the Clinical Electrophysiology of Vision...
April 20, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28434092/cyberbullying-victimization-and-adolescent-mental-health-evidence-of-differential-effects-by-sex-and-mental-health-problem-type
#18
Soyeon Kim, Scott R Colwell, Anna Kata, Michael H Boyle, Katholiki Georgiades
The use of electronic communication technologies has become a core method for adolescent communication. While there are many benefits to such technologies, cyberbullying has emerged as a potential harm. This study examines the association between cyberbullying and adolescent mental health problems and the extent to which this association differs by sex and mental health problem type. A clustered sample of 31,148 students in grades 6-12 (Female = 51.9%; 56.5% Caucasian, 10.2% South Asian) completed an anonymous survey asking their frequency of exposure to traditional forms of bullying, cyberbullying, and experiences of mental health problems over the past 6 months...
April 22, 2017: Journal of Youth and Adolescence
https://www.readbyqxmd.com/read/28433036/an-eqt-based-cdft-approach-for-thermodynamic-properties-of-confined-fluid-mixtures
#19
M H Motevaselian, N R Aluru
We present an empirical potential-based quasi-continuum theory (EQT) to predict the structure and thermodynamic properties of confined fluid mixtures. The central idea in the EQT is to construct potential energies that integrate important atomistic details into a continuum-based model such as the Nernst-Planck equation. The EQT potentials can be also used to construct the excess free energy functional, which is required for the grand potential in the classical density functional theory (cDFT). In this work, we use the EQT-based grand potential to predict various thermodynamic properties of a confined binary mixture of hydrogen and methane molecules inside graphene slit channels of different widths...
April 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28432981/hidden-markov-model-and-chapman-kolmogrov-for-protein-structures-prediction-from-images
#20
Md Sarwar Kamal, Linkon Chowdhury, Mohammad Ibrahim Khan, Amira S Ashour, João Manuel R S Tavares, Nilanjan Dey
Protein structure prediction and analysis are more significant for living organs to perfect asses the living organ functionalities. Several protein structure prediction methods use neural network (NN). However, the Hidden Markov model is more interpretable and effective for more biological data analysis compared to the NN. It employs statistical data analysis to enhance the prediction accuracy. The current work proposed a protein prediction approach from protein images based on Hidden Markov Model and Chapman Kolmogrov equation...
April 13, 2017: Computational Biology and Chemistry
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