In statistics, the term predictive validity refers to the extent that it’s valid to use the score on some scale or test to predict the value…

In statistics, the term reliability refers to the consistency of a measure. If we measure something like intelligence, knowledge, productivity, efficiency, etc. in individuals multiple…

In statistics, parallel forms reliability measures the correlation between two equivalent forms of a test.  The process for calculating parallel forms reliability is as follows:…

In statistics, inter-rater reliability is a way to measure the level of agreement between multiple raters or judges. It is used as a way to assess…

Often researchers want to use some type of test to measure a construct like intelligence, aptitude, educational ability, etc. in individuals of some population. When…

A standard error of measurement, often denoted SEm, estimates the variation around a “true” score for an individual when repeated measures are taken. It is…

Bartlett’s test is a statistical test that is used to determine whether or not the variances between several groups are equal. Many statistical tests (like…

Bartlett’s Test is a statistical test that is used to determine whether or not the variances between several groups are equal. Many statistical tests (like…

The term univariate analysis refers to the analysis of one variable. You can remember this because the prefix “uni” means “one.” There are three common ways…

The term univariate analysis refers to the analysis of one variable. You can remember this because the prefix “uni” means “one.” The purpose of univariate analysis…