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Journal of Patient-Reported Outcomes
Fig. 2. | Journal of Patient-Reported Outcomes

Fig. 2.

From: Validation of the English version of the arrhythmia-specific questionnaire in tachycardia and arrhythmia (ASTA): a Rasch evaluation study

Fig. 2.

Examples of category probability curves that illustrate the problem with disordered thresholds. a Illustrates this problem for item 5 in the Arrhythmia-Specific questionnaire in Tachycardia and Arrhythmia (ASTA) Symptom scale and b illustrates this problem for item 12 in the ASTA Health-Related Quality of Life scale. As can be seen in both illustrations, persons tend to use the highest response category (curve 3) before the next highest response category (curve 2)

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