Triangular contingency tables are a special class of incomplete contingency tables. Association and independence models are used to analyze such tables. Association models can be described in terms of the association parameters for the analysis of triangular contingency tables having ordered categories. The aim of this study is to show the relation between the association parameters of the unif...

BACKGROUND To assess the reproducibility and repeatability of cone imaging in healthy human eyes, using the RTx-1 Adaptive Optics Retinal Camera and its proprietary cone-counting software. DESIGN Single-centre, prospective study. PARTICIPANTS Ten healthy adults. METHODS Macular cones were imaged. Intrasession repeatability was assessed by comparing 10 consecutive acquisitions obtained by ...

Evidence for the reliability and validity of two models of Ambulatory Monitoring, Inc. actigraphs was obtained by testing four instruments of each kind 10 times each on a precision pendulum. Correlation and coefficient of variation methods were used to analyze the data. Reliability coefficients of .98 were obtained for both models. Coefficient of variation methods yielded reliability coefficien...

In this paper the heat transfer characteristics of a two-phase closed thermosyphon over a wide range of heat transfer rates, system pressure, aspect ratios and filling ratios were studied. The experiments focused on the boiling and condensation heat transfer characteristics of the thermosyphon. The experimental boiling and condensation heat transfer coefficients inside the thermosyphon were com...

Correlation coefficients and associated squared values are used as assessment parameters in validation of structure-activity relationships. Seven correlation coefficients were calculated for models that characterized the relationship between chemical structure the herbicidal activity of a triazine analogues series. Three previously reported models were compared by using Pearson (rPrs), Spearman...

this study examined the relationship between psychological ownership dimensions and deviant behavior of physical education teachers in bojnourd city. this study was applied in terms of aim and descriptive - correlation in terms of data collection. the statistical population consisted of male and female physical education teachers in bojnourd city (n=160) and 113 teachers were randomly selected....

Reliability coefficients often take the form of intraclass correlation coefficients. In this article, guidelines are given for choosing among six different forms of the intraclass correlation for reliability studies in which n target are rated by k judges. Relevant to the choice of the coefficient are the appropriate statistical model for the reliability and the application to be made of the re...