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Focus on Variability: New Tools to Study Intra-Individual Variability in Developmental Data [PDF]
Infant Behavior and Development, 2002 In accordance with dynamic systems theory, we assume that variability is an important developmental phenomenon. However, the standard methodological toolkit of the developmental psychologist offers few instruments for the study of variability. In this article we will present several new methods that are especially useful for visualizing and describing ...
P van Geert
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Intra-individual Variability in Women with Breast Cancer
Journal of the International Neuropsychological Society, 2014Abstract Studies assessing cognitive functioning in women treated for breast cancer have used primarily standardized neuropsychological tests and examined accuracy and/or reaction time as outcome measures: they have been inconsistent in identifying the cognitive domains affected and the severity of deficits.
Lori J, Bernstein +2 more
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Intra-individual variability in tinnitus patients
HNO, 2015Most tinnitus studies have attempted to compare groups of individuals, thus revealing inter-individuals differences, i.e., variations between compared subjects. For methodological reasons, inter-individual studies cannot take into account the variability of tinnitus experience, which has been known for decades to be relevant in daily practice with ...
Dauman, Nicolas +3 more
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Individual Differences In Intra-Individual Variability
Journal of Motor Behavior, 1969For each of 75 Ss several estimates of intra-individual variations were calculated for each of 4 motor skills. The reliability of intra-individual variation for these data, estimated from Pearson productmoment correlations, ranged from r = .31 to r = .51 (in all cases p < .05).
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Intra-individual variability in postural blood pressure in the elderly
Clinical Science, 19851. Orthostatic hypotension, an age-related phenomenon, has been associated with hypertension and body weight variability. To evaluate the relative contributions of blood pressure elevation and abnormalities in extracellular volume regulation to orthostatic hypotension, elderly institutionalized subjects (mean age = 87 ± 7 years), taking no ...
L A, Lipsitz +3 more
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Multivariate Behavioral Research, 2018 Our goal is to provide empirical scientists with practical tools and advice with which to test hypotheses related to individual differences in intra-individual variability using the mixed-effects location-scale model.
Jonathan Templin +2 more
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Intra-individual variability in high-functioning patients with schizophrenia
Psychiatry Research, 2010Intra-individual variability of reaction times (IIV) can be employed as a measure of the stability of information processing, which has been proposed to be fundamentally disturbed in schizophrenia. However, the theoretical and clinical significance of IIV is not clear, in part because it has previously been investigated in subject groups with ...
Rentrop, Mirjam +7 more
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Relationships between intra-individual variability and subclinical psychosis
Psychiatry Research, 2019Extensive research indicates that elevated intra-individual variability (IIV) of reaction time is associated with subclinical psychosis, as well as clinically diagnosed psychotic disorder. However, findings regarding the details of this relationship are equivocal.
Simon, Wallace +2 more
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Employment of Intra-Individual Variability to Improve Computerized ECG Interpretation
2001One of the reasons for the limited practical utility of computer programs for interpretation of electrocardiograms (ECGs) is their susceptibility to intraindividual variability. Two of the most prominent sources of intra-individual variability in ECGs, electrode placement variations and respiration, were studied for their effects on computerized ECG ...
Schijvenaars, RJA (Bob) +3 more
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Intra-individual variability of self-esteem in adolescents with spina bifida
International Journal of Rehabilitation Research, 2003The purpose of this study was to explore intra-individual variability of global self-esteem and physical self-worth in adolescents with spina bifida (n = 3). Three adolescents were assessed in their schools by auto-evaluation over a period of 12 weeks (three times a week) with the Physical Self Inventory-6, a six-item questionnaire with a visual ...
Minelli, S. +3 more
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