Sentences with phrase «longitudinal study design»

The necessary design elements for studies testing environmentally related risk factors are longitudinal study design, with - in subject comparison, and sufficient power to determine effect sizes.

Population average models were used to account for the longitudinal study design and correlation of repeated measurements, and an interaction term between maternal education (our socioeconomic measure) and age was included in order to examine whether differences in health inequalities by age were statistically significant.

It is a longitudinal study designed to help us improve our understanding of how memory and other thinking abilities change in people as they age, evaluating persons with and without memory problems throughout their lives.

Academy participants will then receive year - round mentoring and must commit to participate in a longitudinal study designed by university researchers.

At present, there are many K - 12 / university partnerships in place to support technology integration across the country (Hartshorne, Ferdig, & Dawson, 2005) but few rigorous, longitudinal studies designed to examine learning outcomes within them.

Not exact matches

Since we did not conduct a longitudinal design (a study conducted over time tracking the same people) we are unable to validate this assumption.

Design A longitudinal study of infants followed up from birth to age 1 year.

Design, Setting, and Participants This descriptive, longitudinal study examined changes in the nutritional quality of 1741630 school meals at 3 middle schools and 3 high schools in an urban school district in Washington state.

We studied participants in Project Viva, a prospective, longitudinal cohort study designed to examine prenatal factors in relation to pregnancy and child health.

The strongest research methods for psychological studies are: qualitative findings versus quantitative; experimental rather than descriptive or correlational; controlled - experiment, meta - analysis, and observation designs over archival, case study, computational modeling, content analysis, field experiment, interview, neuroimaging, quasi experiment, self - report inventory, random sample survey, or twin study; and prospective (where subjects are recruited prior to the proposed independent effects being administered) and longitudinal (where subjects are studied at multiple time points) rather than retrospective or cross-section study.

This study used data from the Infant Feeding and Practices Study II, a publically available longitudinal data set sponsored by the Centers for Disease Control and Prevention, designed to understand infant feeding patterns, infant health, mother's health, and mother's study used data from the Infant Feeding and Practices Study II, a publically available longitudinal data set sponsored by the Centers for Disease Control and Prevention, designed to understand infant feeding patterns, infant health, mother's health, and mother's Study II, a publically available longitudinal data set sponsored by the Centers for Disease Control and Prevention, designed to understand infant feeding patterns, infant health, mother's health, and mother's diet.

In «Prenatal and Early - life Fructose, Fructose - containing Beverages, and Mid-Childhood Asthma,» researchers report on 1,068 mother - child pairs participating in Project Viva, a longitudinal study based in Eastern Massachusetts designed to find ways to improve the health of mothers and their children.

Although the design of this study did not allow for an examination of causality, the present study lays the groundwork for future longitudinal investigations that further elucidate the relationship among alcohol use, insomnia symptoms and suicide risk.

«We now need longitudinal studies to confirm these findings, because if true, it may be possible to design interventions to help prevent mental health problems in some people with epilepsy.»

Design, Setting, and Participants We used data from the Health and Retirement Study (HRS), a nationally representative, population - based longitudinal survey of individuals in the United States 65 years or older from the 2000 (n = 10546) and 2012 (n = 10511) waves of the HRS.

Participants in the study came from the Teen - Longitudinal Assessment of Bariatric Surgery (Teen - LABS), a study designed to assess the short - and long - term safety and usefulness of bariatric surgery in teens.

More than 430,000 men were part of longitudinal studies over the course of the past 67 years, and no well - designed study has ever shown a direct correlation between total testosterone levels and prostate cancer.

A Sequential Longitudinal Interrupted Time Series Design Study.

The study design allows for both cross-sectional and longitudinal analyses, with the potential to examine both within - and between - person associations between fiber and CRP.

First, quality studies in education (large sample sizes, randomized, cross-over design, longitudinal, etc.) are very expensive and rare.

«The Design and Analysis of Longitudinal Studies of Psychopathology and Development in Context: Statistical Models and Methodological Recommendations,» in Development and Psychopathology (with J. Willett, and N. Martin), (1998)

And, in fact, the longitudinal design was such that we had students in Years 3, 5, 7 and 9 at the beginning of the study, in the first year, and so at the very end of the study they were in [Years] 6, 8, 10 and 12.

Although our study was intended as a 1 - year proof - of - concept research design, we have demonstrated sufficiently positive results for other researchers to pursue longitudinal investigations that track preservice teacher behaviors into their first few years of practice.

This longitudinal, field - based study of programs of study (POS) / career pathways was designed using rigorous research methods to estimate the impact of POS on high school students» academic and technical achievement outcomes through the completion of high school.

To explore this question, we designed a year - long longitudinal study, now underway, on the innovation adoption process as it relates to ereaders and our colleagues.

Baumrind also points out that even when the study is well designed, the problem remains that many of these studies are cross-sectional rather than longitudinal.

We do not believe that design differences (the design of Rhee et al13 was longitudinal, whereas the current study was cross-sectional) account for this, because children's BMI status is already very stable by school entry, suggesting that reanalysis using wave 2 LSAC longitudinal BMI status as the outcome will most likely yield congruent results.

The study adapted longitudinal design.

Six studies used a longitudinal design.

To apply this design, we turned to a second sample, the Environmental - Risk Longitudinal Twin Study (E-Risk), where we have been tracking a birth cohort of British twins since their birth in 1994 to 1995 with 96 % retention (SI Appendix).

The power calculation for detecting the association between perceived discrimination and psychotic symptoms (delusional hallucination) was based on Janssen et al. 21 This study differs from our study because it has a longitudinal design and it also includes Dutch inhabitants, not only migrants.

This study benefitted from a longitudinal design, with measures repeated at each time point so that we were able to examine cross-sectional data at both time points in additional to the prospective analysis.

The study design was descriptive, using a prospective longitudinal design.

RESEARCH DESIGN AND METHODS We conducted a prospective longitudinal study using MRI and spectroscopy to quantify whole - body and regional AT volumes, and IHCL content, within 2 weeks and 8 — 12 weeks after birth.

Although important, those results were limited by the small number of studies included in the meta - analysis (which also precluded the possibility of testing for possible moderators), and the results were also limited by the fact that only 2 of them used a longitudinal design.

Given the ease of use of a questionnaire compared with an observational design, researchers can also conduct longitudinal studies to examine predictive or bidirectional links between parental strategies and children's emotional competences.

Several candidate mechanisms of CRCI have been proposed, including inflammation and cytokine dysregulation, chemotherapy - induced epigenetic changes, blood — brain barrier disruption, hormone deficiencies, oxidative DNA damage and shortened telomere length, and genetic susceptibility.21 — 26 However, the heterogeneity and design limitations within the emerging body of evidence have led to recommendations for harmonising study methodologies and moving towards multisite, longitudinal research.3 27 Such approaches would support the demonstration of robust relationships between measurable biological processes and cognitive outcomes.

This design was created in 1985 by nesting an intervention initiated in 1981 at first - grade entry, within the longitudinal panel study.

Six studies were longitudinal studies, and 24 used a cross-sectional design.

Design Data from the Longitudinal Studies of Child Abuse and Neglect collected through interviews and questionnaires administered when target children were 4 years old and 6 years old.

She uses diverse methodologies to investigate these topics, including developmental approaches, biological methods, field studies, experimental designs, and longitudinal and daily - report studies.

Lifeways is a longitudinal cross-generation cohort study, designed to collect longitudinal life - course data in Ireland and investigate the effect of food and nutrition on health.

The present study also has numerous methodological strengths, including the size and composition of the sample; the use of a prospective longitudinal design; the systematic assessment of maladaptive parenting, childhood maltreatment, parental and offspring psychiatric symptoms, negative life events, and severe interpersonal difficulties based on data from multiple informants; and the use of statistical procedures to control for offspring age, sex, and offspring and parental psychiatric symptoms.

The strength of the study is the two - point in time longitudinal design that will enable us to investigate the relationship between stigmatising attitude towards PLWHA and professionalisation by looking at change (s) in attitudes over a time period.

Design, Setting, and Participants Longitudinal cohort study analyzing 823 magnetic resonance imaging scans of 389 typically developing children and adolescents aged 4 to 22 years from the National Institutes of Health Magnetic Resonance Imaging Study of Normal Brain Development with complete sociodemographic and neuroimaging study analyzing 823 magnetic resonance imaging scans of 389 typically developing children and adolescents aged 4 to 22 years from the National Institutes of Health Magnetic Resonance Imaging Study of Normal Brain Development with complete sociodemographic and neuroimaging Study of Normal Brain Development with complete sociodemographic and neuroimaging data.

Because of its unique prospective, longitudinal design, this study makes several improvements over the existing literature.

The MAPS study employed a randomized experimental longitudinal design with 113 stepfamilies shortly after marriage.

To date, the immediate and lasting positive effects of quality care on language, cognitive development, and school achievement have been confirmed by converging findings from large, reasonably representative longitudinal studies and smaller, randomized trials with long - term follow - ups.1, 2,9 - 13 Contributors to this knowledge base include meta - analytic reviews of interventions and large longitudinal studies conducted in several countries.1, 2,14,15 Comprehensive meta - analyses now establish that effects of early care decline, but do not disappear, and when initial effects are large, long - term effects remain substantial.1, 2 Null findings in cognitive and social domains in a few studies may reasonably be attributed to the limitations inherent to their designs, samples, and measures.

The Pathways Project is an ongoing longitudinal study funded by the National Institutes of Health that was designed to expand our understanding of child, family, school and peer factors that influence children's progress and adjustment as they begin kindergarten at age five.

Because status and typecasting are determined partly by the group's reaction to characteristics an individual was born with (Rowe, 1989), the best way to test this aspect of GS theory is to study within - group processes in children's groups using genetically informative longitudinal designs.