Item Analysis Analytics Part 6: Determining Whether a Question Makes the Grade

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Posted by Greg Pope

In my previous blog post I talked about outcome discrimination and outcome correlation and their relationship to one another. Now I will provide some criteria that can be used for outcome discrimination and outcome correlation coefficients to judge whether a question is making the grade in terms of psychometric quality.

Outcome discrimination (high-low)

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Outcome correlation (Point-biserial correlation)

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I’ll be back with more juicy psychometrics soon!

One Response to “Item Analysis Analytics Part 6: Determining Whether a Question Makes the Grade”

  1. gie celiz says:

    Where are the other parts of this article? It could really help me with my thesis. Thank you for posting this! 🙂

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