I took opinion from public health specialists about different indicators to create a city health profile. I tried to draw item characteristic curves for each indicator with R software. Please help me in interpretation of this chart.
Data is the score for each indicator i.e a continuous variable ranged between 1.00 to 5.00 (with decimals)
ICCs indicate a what end of thebtrait continuum os the focal item mist most appropriate, as well as how tge respinse categoris perform. For example, cross-pver catoegories can indicate plausible non-monotonicity or item bias (DIF assessment)
Till now i understood that, score 5 started and raised to peak immediately, after agreebleness became positive, i.e., more than zero. So among all the scores, 5th score is most agreeable score for under 5 mortality.
Hi...I think you used wrong IRT model....your data contiuous....
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