Item response category characteristic curves estimated using a unidimensional graded response model (IMAGE)
Caption
Questions (denotes as “Items” in the Figure) 1–20 correspond to the question numbers. For the response categories (Score 1: strongly disagree–Score 5: strongly agree), scores were reversed for questions with opposite response directions to ensure consistent evaluation across all questions. Most questions show a stepwise shift in the distribution of response categories as θ increases, and the curves overlap less. Conversely, Questions 3 and 13 do not follow this stepwise pattern, and the curves overlap greatly. Thus, researchers were able to quantitatively evaluate which questions performed well and which did not.
Credit
Dr. Masaki Mori from Japan Advanced Institute of Science and Technology (JAIST), Japan Image source link: https://link.springer.com/article/10.3758/s13428-026-03145-3
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License
CC BY