Showing papers on "Intraclass correlation published in 1981"
66 citations
TL;DR: In this paper, the authors examined the applicability of the z transform and Fisher's modified formula to studies in human genetics involving unequal family sizes, and they showed that all simulated z transforms were normally distributed with variances that agreed with the values calculated from a modification of Fisher's formula.
Abstract: We examined three issues: (1) properties of the intraclass correlation coefficient (r 1); (2) normality of its z transform; and (3) Fisher's formula for the variance of z. To do this we simulated 1,000 samples of r 1 and of z for several values of p, both for equal and for unequal family sizes. Those samples permitted us to evaluate some of Fisher's remarks on the bias, variance, and normally of r 1 Furthermore, they showed us that all simulated z transforms were normally distributed with variances that agreed with the values calculated from a modification of Fisher's formula. Those last two results affirm the applicability of the z transform and of Fisher's modified formula to studies in human genetics involving unequal family sizes.
13 citations
TL;DR: In this paper, a computer program to calculate six different forms of intraclass correlation coefficients is described, the computational formulas used, input preparation and output description are given, and the criteria in choosing an appropriate form of the intrACCS are briefly mentioned.
Abstract: A computer program to calculate six different forms of intraclass correlation coefficients is described. The computational formulas used, input preparation and output description are given. The criteria in choosing an appropriate form of the intraclass correlation coefficients are briefly mentioned.
12 citations
TL;DR: A procedural model was tested and implemented by faculty and students in the Coordinated Undergraduate Program at the University of Tennessee, Knoxville and is suggested for implementation in any program from which established validity and reliability in evaluation are desired.
Abstract: Performance evaluation as conducted among a number of raters using several evaluation tools requires the qualities of content validity and interrater reliability to be fair and effective. A procedural model was tested and implemented by faculty and students in the Coordinated Undergraduate Program (CUP) at the University of Tennessee, Knoxville. A checklist for evaluation of employee counseling techniques achieved an intraclass correlation of 0.72 when used by clinical instructors in a series of workshops. The procedure included development of a form, its use in a standardized situation, discussion, calculation of intraclass correlation, and review. The model is suggested for implementation in any program from which established validity and reliability in evaluation are desired.
4 citations
31 Aug 1981
TL;DR: In this article, an alternative based on a within-group procedure is proposed and shown to be superior to the intraclass correlation in the condition of low variation among group means, accompanied by low within group variation.
Abstract: : Estimates of interrater reliability are often needed for incomplete designs in which raters (eg, employees) are nested within targets (eg, organizations) It is shown that the popular use of estimates based on between-group ANOVAs accompanied by intraclass correlations can be seriously misleading if low variation exists among target means An alternative based on a within-group procedure is proposed and shown to be superior to the intraclass correlation in the condition of low variation among group means, accompanied by low within-group variation (Author)
3 citations