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To Bin Or Not To Bin? A Comparison Of Symptom Frequency Response Formats In The Assessment Of Health-Related Quality Of Life, Brooke E. Magnus, Mackenzie S. Kirkman, Twinkle Dutta, Manpreet Kaur, Nichole Mannchen
To Bin Or Not To Bin? A Comparison Of Symptom Frequency Response Formats In The Assessment Of Health-Related Quality Of Life, Brooke E. Magnus, Mackenzie S. Kirkman, Twinkle Dutta, Manpreet Kaur, Nichole Mannchen
Psychology Faculty Research and Publications
Purpose
The goal of this study is to compare three different types of retrospective frequency response formats on the Healthy Days Symptoms Module (HDSM). Responses are compared in terms of intra-individual consistency, psychometric value, and participant feedback about each type of response format.
Methods
Respondents each completed three versions of the HDSM, where items were framed to elicit an open-ended frequency, a fixed choice frequency, or a vague quantifier response. Traditional reliability statistics were used to evaluate intra-individual consistency. Differential item functioning (DIF) was used to test for response format effects, and item response theory (IRT) scale scores and standard …