Making use of IRT in the assessment of change
Joint work with Emily Ho from Northwestern University in Chicago and Jay Verkuilen from the CUNY Graduate Center, New York was published in the special section Methodologies for Meaningful Change in Quality of Life Research!
In this paper, we looked into the assessment of change over time. We used plausible value imputation to calculate probabilities, whether respondents' patient-reported outcomes changed over time, e.g. compared to baseline or some other reference point. We also showed that CATs have a better ability to pick up change across the score continuum.
The special section holds other interesting work as well. Drop me an email, if you’d like to know more.