Assessing differential item functioning for the Social Appearance Anxiety Scale: a Scleroderma atient-centred Intervention Network (SPIN) Cohort Study
Objectives The Social Appearance Anxiety Scale (SAAS) is a 16-item questionnaire developed to evaluate fear of appearance-based evaluation by others. The primary objective of this research was to investigate the existence of differential item functioning (DIF) for the 16 SAAS items, comparing patien...
Main Authors: | , , , , , , , |
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Format: | Article |
Language: | English |
Published: |
BMJ Publishing Group
2020-10-01
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Series: | BMJ Open |
Online Access: | https://bmjopen.bmj.com/content/10/10/e037639.full |