Showing papers on "Intraclass correlation published in 1983"
TL;DR: It is suggested that a 3-day dietary record provides reliable estimates of the intake of almost all nutrients, particularly in children.
157 citations
TL;DR: For the unbalanced analysis of covariance model with one covariate, a simple formula is given for the intraclass correlation coefficient estimator that results from Henderson's Method 3 estimation of variance components as discussed by the authors.
Abstract: For the unbalanced analysis of covariance model with one covariate, a simple formula is given for the intraclass correlation coefficient estimator that results from Henderson's Method 3 estimation of variance components. Example calculations and the corresponding interpretations are given for a study of the correlation of iron content among brothers. The example illustrates the manner in which the estimator depends on the pattern of correlation between the covariate and the variable under investigation.
66 citations
TL;DR: The maximum likelihood estimator of a common intraclass correlation, rhoM, is derived in two independent samples drawn from multivariate normal populations using a procedure based on Fisher's transformation.
Abstract: The maximum likelihood estimator, rhoM, of a common intraclass correlation, rho, is derived in two independent samples drawn from multivariate normal populations. A likelihood ratio statistic for testing the assumption of a common rho is also derived and examples are given. Comparisons are made with a procedure based on Fisher's transformation.
61 citations
TL;DR: Boys who had been referred by their teachers due to problem behavior obtained significantly higher behavior problem scores and significantly lower on-task scores than a matched sample of normal boys observed in the same classrooms.
Abstract: This article reports reliability and validity data for the Direct Observation Form (DOF) of the Child Behavior Checklist. Observational data were collected on two samples of boys aged 6–11 in classroom settings. Interobserver agreement was high: r=.92 for behavior problem score and r =.83 for on-task score. Generalizability, as measured by the one-way intraclass correlation, was .86 and .71 for behavior problem score and on-task score, respectively. In terms of validity, DOF scores correlated significantly and in the expected directions with teacher-reported problem behavior, school performance, and adaptive functioning. In addition, boys who had been referred by their teachers due to problem behavior obtained significantly higher behavior problem scores and significantly lower on-task scores than a matched sample of normal boys observed in the same classrooms.
51 citations
TL;DR: In this paper, the authors examined reviewer reliability for the first two years of operation of Developmental Review and found that summary recommendations on publishability were higher in reliability than previously reported for other journals.
46 citations
Journal Article•
TL;DR: The results argue strongly for the reality of the leg length inequality phenomenon and also that it can be reliably measured.
17 citations
TL;DR: In this article, the adequacy of Fisher's approximation to the large sample variance of an intraclass correlation is investigated in the context of family studies, and it is found that the approximation is highly accurate in samples of moderately large size (≧ 30 families), and can also be used for significance testing under a broad range of circumstances.
Abstract: The adequacy of Fisher's approximation to the large sample variance of an intraclass correlation is investigated in the context of family studies. It is found that the approximation is highly accurate in samples of moderately large size (≧ 30 families), and can also be used for significance-testing under a broad range of circumstances. The exact sampling of distribution of the intraclass correlation coefficient is also derived.
14 citations
TL;DR: Analyses of variance under the assumptions of either independence or intraclass correlation among observations were carried out on theoretical dental research data, finding the independence model provided tests which were too likely to reject the null hypothesis.
Abstract: Analyses of variance under the assumptions of either independence or intraclass correlation among observations were carried out on theoretical dental research data. Data sets varied with respect to the magnitude of a between-subjects treatment effect and the variance of scores within subjects. When scores within subjects were positively correlated (i.e., the intraclass correlation coefficient was greater than zero), the independence model provided tests which were too likely to reject the null hypothesis. Dental researchers who analyze sites (e.g., teeth, pockets) as independent observations, without establishing the intraclass correlation to be near zero, run the risk of reporting results in terms of an improper statistical model
11 citations
TL;DR: In this article, the estimation of a real-valued function of the parameter by minimizing the expected value of the quadratic loss function relative to the structural distribution of the parameters is proposed; this is called structural estimation.
Abstract: In this paper, the estimation of a real-valued function of the parameter by minimizing the expected value of the quadratic loss function relative to the structural distribution of the parameter is proposed; this is called structural estimation. The general formulae developed have been used to obtain the structural estimate of the bivariate correlation coefficient and of the intraclass correlation coefficient.
3 citations