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Leadership in the Science of Psychometrics

Our Mission:

To positively impact educational and career opportunities by facilitating the development of fair, valid, and reliable assessments.

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Education

What is a z-Score?

A z-score measures the distance between a raw score and a mean in standard deviation units. The z-score is also known as a standard score

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Credentialing

Ebel Method of Standard Setting

The Ebel method of standard setting is a psychometric approach to establish a cut score for tests consisting of multiple-choice questions. It is usually used

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