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Fig. 1 | BMC Medical Informatics and Decision Making

Fig. 1

From: Item response theory analysis and properties of decisional conflict scales: findings from two multi-site trials of men with localized prostate cancer

Fig. 1

Category characteristic curves for support subscale items on the DCS-12, aggregated DCS-12, and LL DCS-10. Probability (y-axis) represents the probability that a respondent will select a response option, given the respondent’s latent trait value (x-axis). In this analysis, decisional conflict is the latent trait being measured. For the DCS-12, response options are as follows: 0 (strongly agree), 1 (agree), 2 (neither agree nor disagree), 3 (disagree), 4 (strongly disagree) For the aggregated DCS-12, response options are as follows: 0–1 (strongly agree/agree), 2 (neither agree nor disagree), 3–4 (disagree/strongly disagree). For the LL DCS-10, response options are yes, no, and unsure

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