Sentence examples for based on polychoric correlation from inspiring English sources
The data set of 54 samples with 12 variables (pollutants) was based on unbalanced nested hierarchical sampling design, and is expressed as intensity on an ordinal scale from 1 to 5. Nonparametric Kruskal-Wallis test for testing statistical significance of pollutants at various levels of sampling design, and factor analysis based on polychoric correlation, were used in this study.
In other cases some researchers use weighted least squares based on polychoric correlation.
Model estimation was based on polychoric correlation among items and weighted least squares methodologies (WLS).
Composite scores were calculated for the depressive symptoms by applying confirmatory factor analysis fitting a single-factor measurement model using weighted least squares estimation based on polychoric correlation matrices.
We chose unweighted least squares (ULS) estimation based on polychoric correlation matrices and variance-adjusted estimation methods to improve the precision of our estimates given these skewed categorical data [ 20, 22].
As the items were assessed on an ordinal measurement level, we estimated the CFAs based on polychoric correlations, using the lavaan package in R60.
The implemented factor analyses were based on polychoric correlations, an extension of the tetrachoric correlation between two bivariate distributed continuous variables measured at an ordinal level.
The former is based on polychoric correlations and assumes continuity in the underlying construct, not that data themselves are continuous, whereas the latter is based on Pearson correlations and assumes that data are continuous.
It was hence based on polychoric correlations.
Due to the scaling of the MC-C, the input matrix was based on polychoric correlations and the ordinary least squares method was used for parameter estimation [ 43].
Due to the ordinal nature of item responses, both factor analysis and the calculation of Cronbach's alpha were based on polychoric correlations.
