Click the button if you would like to be notified when new information, software, articles etc. are uploaded to my website.
1. Conventional interrater reliability: definitions, formulae, and worked examples in SPSS and STATISTICA.
2. Skewness and Pearson correlations: attenuation of coefficient size as a function of skewed data.
3. Percentiles and percentile ranks: confused or what?
4. Numbers of variables, cases, and factor-solution stability.
5. Ordinary least squares regression: assumptions and some clarity.
6. Euclidean distance: raw, normalized, and double-scaled coefficients.
7. KR-20, Cronbach alpha, and binary-response items.
8. Likert coarse-categorization: Pearson correlation attenuation due to categorizing a continuous-valued quantitative variable.
9. Test reliability and validity: The inappropriate use of the Pearson and other variance ratio coefficients for indexing reliability and validity.
10. The Binomial Effect Size Display (BESD).
Two reference articles important to the content of this report are available for download:
12. Hierarchical Multiple Linear Regression: Interpreting Deviation R-Squares.