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Fig. 1 | Health and Quality of Life Outcomes

Fig. 1

From: Validation of the Dutch version of the Swallowing Quality-of-Life Questionnaire (DSWAL-QoL) and the adjusted DSWAL-QoL (aDSWAL-QoL) using item analysis with the Rasch model: a pilot study

Fig. 1

Category probability curve with ordered thresholds. Category probability curve displaying ordered thresholds for item 8 of the total DSWAL-QoL scale. This item has five response categories, resulting in 4 thresholds that increase in their location on the latent trait in a manner consistent with the increase in the underlying trait being measured. Note that the original response category structure of ‘1 to 5’ was transformed into ‘0 to 4’ by the Rumm software. Each response category (0, 1, 2, 3, 4) has a point (indicated by a peak in the curve) along the latent trait at the point of the most probable response

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Health and Quality of Life Outcomes

ISSN: 1477-7525

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