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 19 of 19 for “"intraindividual variability"”.
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Intraindividual Variability as a Correlate of White Matter Decline
… been associated with increased reaction time intraindividual variability (IIV). In previous studies this age-related increase in IIV has been associated with white matter volumes and microstructure. However, the association between IIV and white matter has not been contextualized with other …
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Intraindividual variability and micro-structural white matter changes in Alzheimer’s disease
… neural overlaps with AD is the measurement of intraindividual variability (IIV; the within-person variation in performance over multiple trials of a single task). IIV researchers have highlighted the role of white matter in increased IIV, and micro-structural white matter changes have been …
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Sleep intraindividual variability and fatigue in parents of children on the autism spectrum
… fatigue, research on the association between the variability of sleep measures within a person (i.e., intraindividual variability; IIV) and fatigue is limited. Additionally, the role of child sleep in the relationship between parent sleep and fatigue has yet to be explicitly explored, which may be …
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Intraindividual variability in sleep is related to sleep quality and psychosocial and academic outcomes.
… learned about another sleep health dimension ── intraindividual variability (IIV) in sleep patterns across days. To assess sleep IIV, researchers typically needed to monitor sleep for a period of time (i.e., usually a week), which is time- and resource-demanding. To overcome this challenge, we …
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The negative influence of adiposity extends to intraindividual variability in cognitive control among preadolescent children
… using mean accuracy, mean reaction time, and intraindividual variability (IIV) among preadolescents. Methods: Children 7-9 years old (N=233, 133 females) underwent dual-energy x-ray absorptiometry and a VO2peak test to assess whole-body adiposity and aerobic fitness relative to fat-free mass …
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Differential Sensitivity of Intraindividual Variability Dispersion and Global Cognition in the Prediction of Functional Outcomes and Premature Mortality in Precariously Housed and Homeless Adults
… negatively impacting neurocognitive functioning. Intraindividual variability (IIV) across neuropsychological tests (i.e., IIV dispersion) has been used as a marker of frontal system pathology. Increased IIV dispersion has been associated with worse cognitive functioning, everyday functioning, and …
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Age Differences in Prospective Memory: An Examination of the Role of Fluctuations in Executive Control
… regarding age differences in performance variability on speeded components of ProM tasks that vary in the extent to which controlled processes are required. This study consisted of two experiments designed to test those predictions. In the first experiment, the degree to which controlled …
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Variability in fecal microbial drug deglucuronidation
… and ezetimibe. Additionally, inter- and intraindividual variability in deglucuronidation activities was assessed by utilizing multiple fecal samples collected at different time points from each of the three healthy donors. Only the isolates Bacteroides thetaiotaomicron, Bacteroides …
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The use of multiple measures, repeated feedback, goal setting, shaping, and nutrition education to lower serum cholesterol levels in males
… multiple measures also allowed for the study of intraindividual variability. issues pertaining to maintenance of effect, cost-effectiveness, and generalizability are also discussed.
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The urinary excretion of mercapturic acids in free-living adult males
… of variance showed a large degree of inter- and intraindividual variability. The interindividual coefficients of variation in mmole -SH/24 hr and umole -SH/mmole creatinine were 37.7% and 31.2%, respectively. The intraindividual coefficients of variation in mmole -SH/24 hr and umole - SH/mmole …
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The development and characterisation of MicroRNA and gemcitabine nanotherapies for the treatment of pancreatic cancer
… mechanism of evading gemcitabine resistance and intraindividual variability. Furthermore, RALA/GTP nanoparticles demonstrated potentiation of the cytotoxic effect of the chemotherapeutic agent by 8- to 24-fold compared to the parental drug.<br/><br/><i>Thesis embargoed until 31 July 2027.</i>
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Intra-individual variability in adult ADHD: an exploration of the viability of distinct purely inattentive condition
Researchers have suggested that intraindividual variability (IIV), or variation in cognitive testing performance within an individual across a measure or group of measures, may be an endophenotypic marker of Attention-Deficit/Hyperactivity Disorder (ADHD). However, not all studies have consistently …
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Alexithymia subscales have distinct roles in both the variability of arousal ratings and in associations with anxiety and psychological inflexibility
… and questionnaire responses. We computed rating variability as difference scores between paired stimuli. High alexithymia and DIF increased variability of arousal ratings, and generalized anxiety increased both ratings and their variability, but only for low-arousal stimuli. The strongest effects …
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THE BEHAVIOR OF THE SCYPHOMEDUSAE CHRYSAORA QUINQUECIRRHA AND AURELIA AURITA AND ITS ECOLOGICAL IMPORTANCE
… by medusa groups depended on interindividual and intraindividual variability in medusa behavior, including deterministic changes in swimming pulsation strength and turning. Empirical and model results showed that variability of behavior among medusae and by individual medusae over time are …
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Stability and variability in perceptual cognition and visual noticing
… and on cognitive task performance, identifying variability between individuals in performance across tasks by alternating between literature reviews, descriptive analyses of two multivariate datasets, and theoretical discussion. More specifically, Chapter One reviews the paradigmatic context of …
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A Daily Study Of The Sleep-Pain Relationship In Fibromyalgia
… modeling (HLM) was utilized to examine the intraindividual variability in daily sleep and pain among participants, as well as the baseline factors that explain individual differences in this relationship. </p> <p>Results of this study suggest that there is a bidirectional relationship …
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The Mediating Role of Social Connectedness in the Association Between Volunteering and Affect in Daily Life: A Dynamic Approach
… models used for Study 1 showed baseline (i.e., intraindividual means) levels of the affective states of calm ( b = 1.58, p < .01), satisfaction ( b = 0.63, p < .05), and jittery ( b = 0.49, p < .05) were significantly related to time spent volunteering. Also, intraindividual variability in the …
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Determinants and correlates of intra-individual variability in reaction time
… individual, or mean RT. Increasingly, however, intraindividual variability in reaction time (RT IIV) – the consistency of responses by a single person across trials – is used as an additional or even alternative measure. RT IIV is often found to be elevated in a number of conditions that affect …
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The Chemistry of Flavonoids in Model Beverages and Human Milk
… present in human milk samples with high inter/intraindividual variability. With the exception of kaempferol, the mean flavonoid content in human milk was not statistically different among lactation stages. In contrast, carotenoids in human milk significantly decreased from weeks 1 to 13 of …