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Author: Zach

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What is Predictive Validity? (Definition & Examples)

Posted on February 27, 2021 by Zach

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…

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What is Reliability Analysis? (Definition & Example)

Posted on February 27, 2021 by Zach

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…

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What is Parallel Forms Reliability? (Definition & Example)

Posted on February 26, 2021February 27, 2021 by Zach

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:…

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What is Inter-rater Reliability? (Definition & Example)

Posted on February 26, 2021February 27, 2021 by Zach

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…

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What is Test-Retest Reliability? (Definition & Example)

Posted on February 26, 2021February 27, 2021 by Zach

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…

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Standard Error of Measurement: Definition & Example

Posted on February 26, 2021February 27, 2021 by Zach

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…

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How to Perform Bartlett’s Test in R (Step-by-Step)

Posted on February 25, 2021 by Zach

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…

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Bartlett’s Test for Homogeneity of Variances (Definition & Example)

Posted on February 25, 2021 by Zach

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…

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How to Perform Univariate Analysis in R (With Examples)

Posted on February 25, 2021 by Zach

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…

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What is Univariate Analysis? (Definition & Example)

Posted on February 25, 2021 by Zach

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…

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Recent Posts

  • What is Predictive Validity? (Definition & Examples)
  • What is Reliability Analysis? (Definition & Example)
  • What is Parallel Forms Reliability? (Definition & Example)
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