Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 346 for “"Longitudinal Studies;"”.
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Bayesian regularized quantile mixed models for longitudinal studies
In longitudinal studies, the same subjects are measured repeatedly over time, leading to correlations among the repeated measurements. Properly accounting for the intra-cluster correlations in the presence of data heterogeneity and long tailed distributions of the disease phenotype is challenging, …
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Interests, personality, and career success: Two longitudinal studies
… life outcomes. This dissertation includes two studies that examine personality and interest development from adolescence to young adulthood. Study one examined three types of continuity and change in interests and personality. Study two extended these analyses to a new sample while also …
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Attrition in Longitudinal Studies Using Older Adults: A Meta-Analysis
Longitudinal methods have become an improved and essential means of measuring intra-individual change over time. Yet one of the greatest and most hazardous drawbacks studying participants over multiple sessions can be the loss of participants over time. This study attempts to illuminate the problem …
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Stability and change in values: A meta-analysis of longitudinal studies
A meta-analysis of longitudinal studies was conducted to investigate stability and change in values across the life span. Both rank-order stability and mean-level change were investigated for all four different value categories. Results of rank-order stability indicated that values are rather …
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Patterns of Mean -Level Changes in Vocational Interests: A Quantitative Review of Longitudinal Studies
… in mean-level changes of basic interests. Longer studies showed greater change. The ages at which the greatest change occurred were markedly different across general and basic interest categories, suggesting differential rates or timelines of development across the broad band of interests.
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Art Representations as Functions of Depressive State: Longitudinal Studies in Chronic Childhood and Adolescent Depression
… Series (DDS) and Center for Epidemiological Studies Depression Scale (CES-D) were administered eight times for each S over two to four months. CES-D scores established varying levels of depressive state for each period in which the DDS was administered. Three independent raters used the …
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Building Good Habits. Longitudinal Studies on Malleable Psychological Factors, Reduced Motivational Interference, and Facilitated Goal Attainment
… people. Two of the datasets stem from controlled studies with university students building learning habits over a six-week time frame, and one dataset contains user data from a published iOS app. For the first paper, I created a habit building app, which led the participants through a self-guided, …
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Accumulation Of Subcortical Iron As A Modifier Of Volumetric And Cognitive Decline In Healthy Aging: Two Longitudinal Studies
… and neurodegenerative disease. Relatively few studies of brain iron in normal aging exist and extant studies are almost exclusively cross-sectional. Here, I estimated iron content via T2* and measured volumes in several brain regions in two independent samples of healthy adults. The first …
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The grief process and reaction to job loss
… based on the components of grief derived from studies of bereavement. Other measures assessed the degree of attachment to the former job. This was followed by a cross-sectional study involving 60 men who had lost their jobs over the previous eight years. All of the individual components of …
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Obesity, Diabetes, and Disability in Older Mexican Americans, 1993-2011
… has focused on cross-sectional or short-term longitudinal studies of non-Hispanic populations to explain disparities by age, gender, and nativity. There have only been a few long-term longitudinal studies that have looked at obesity, diabetes, and disability among older Mexican Americans. …
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Ultrasound probe localization by tracking skin features
… ultrasound (3D US), image-guided surgery, and longitudinal studies. Existing methods for probe localization, however, typically involve bulky and expensive equipment, and suffer from patient motion artifacts. This thesis presents a highly cost-effective and miniature-mobile system for …
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Dynamic Prediction of Disease Progression With Longitudinal Data
… time-to-event outcomes based on evolving longitudinal data. This process often leverages the integration of longitudinal and time-to-event data through joint modeling, a prevalent technique. Alongside joint modeling, landmark modeling stands as another key approach in the realm of …
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The effects of monetary and non-monetary incentives on respondent attrition in longitudinal survey
Longitudinal studies are essential for governments and organizations as they help in making decisions that are based on factual data. Longitudinal studies collect data repeatedly from a set of participants over a period of time, enabling the tracking and studying of entity behaviour at individual, …
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The association between light physical activity and cognition among adults: A scoping review
… independent of MVPA engagement. These recent studies have primarily focused on the relationship between LPA and health outcomes such as morbidity and mortality risk and have not investigated a possible relationship with cognitive function. Purpose: The purpose of this scoping review is to …
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Novel Statistical Methods for Multiple-variant Genetic Association Studies with Related Individuals
Genetic association studies usually include related individuals. Meanwhile, high-throughput sequencing technologies produce data of multiple genetic variants. Due to linkage disequilibrium (LD) and familial relatedness, the genotype data from such studies often carries complex correlations. …
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The consequences of ignoring assessment date heterogeneity within waves for latent growth models
… assume that assessment dates within waves from longitudinal studies are homogeneous, although they are nearly always heterogeneous. In this study, we present a pedagogical illustration of assessing the consequences of ignoring time-point variability within a wave using the Math Item Response …
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A study of strategy formulation in an automotive manufacturer
… Group were investigated using a behaviour based longitudinal examination. The investigating method used was developed from Mintzberg's classical diachronic study approach through the adoption of an observing participant approach supplemented with probes into specific areas of the organisation's …
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Semiparametric analysis of multivariate longitudinal data
… OF MISSOURI-COLUMBIA AT AUTHOR'S REQUEST.] Longitudinal studies are conducted widely in fields such as agriculture and life sciences, business and industry, demography and other social sciences, medicine and public health. In longitudinal studies, individuals are measured repeatedly over …
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