• Home
  • Standards
  • Item Analysis Analytics Part 6: Determining Whether a Question Makes the Grade
  • Item An...
greg_pope-150x1502

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)
part-6-pic-1
Outcome correlation (Point-biserial correlation)
part-6-pic2
I’ll be back with more juicy psychometrics soon!