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CITAS: Classical Item and Test Analysis Spreadsheet

CITAS is a simple, easy-to-use spreadsheet for non-psychometricians to evaluate the reliability of their items and tests.

CITAS output with histogram

What is CITAS?

CITAS is an easy-to-use tool for implementing classical test theory, designed to provide a straightforward and no-cost way for non-psychometricians to evaluate the quality of assessments. If you are using assessments but not evaluating their statistics, you have no way of knowing whether your test is reliable.

CITAS is intended for anyone that is new to psychometrics and wants a simple tool to help learn the analytics. It’s limited to 100 examinees and 100 items.

Download CITAS for Free

CITAS is available for free. Just complete this form and we will send you a link to download.  Note that because it is free, we do not provide any support.

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citas screenshot

What can CITAS do?

  • Mean: The average score
  • Standard deviation: An index of the variation in scores
  • Reliability: An index of test quality on a scale of 0 to 1, using coefficient alpha (aka KR20)
  • Standard Error of Measurement (SEM): An index of score error that can be used to create confidence intervals, with a classical test theory approach
  • Item P values: An item difficulty statistic, calculated as the proportion of examinees that responded correctly
  • Item point-biserials: An item discrimination statistic, calculated as the correlation between item score and total score; weak items are <0.20 and bad items are <0.0
  • Distractor analysis: Frequencies of each item response, do determine if there are confusing options.

More information on the psychometric terms can be found by reading the CITAS Manual.

How do I use CITAS for classical item and test analysis?

Simply type or paste your data into an Excel spreadsheet and the statistics populate in real time – no coding or “running” needed. But while simple to use, it still provides essential output with industry-standard Classical Test Theory for small samples.

Need a pro tool? Download Iteman instead

Need a deeper analysis or have more than 100 examinees?  You need Iteman, which automatically creates Word reports with comprehensive graphics and narratives, and far more statistical output.  Iteman also comes with a free version for up to 100 examinees.