Propensity score matching is a statistical methodology that is used in observation research designs. It also is very useful for controlling for confounding variables in multivariate models. A new page has been added describing its use in research.

I published all of the research calculators available in Research Engineer to one page for easier access. New pages are also available for internal consistency reliability and inter-rater reliability. 

If you use Research Engineer for purposes of regression analysis, then you have seen the methods analyses associated with residual analysis and meeting certain statistical assumptions like linearity, normality, and equal variances. New pages are available to give deeper insights into these important statistical assumptions.

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