OBJECTIVE To investigate whether strength of social feedback, i.e. other people who concur (or do not concur) with one's own answer to a question, influences the way one answers health questions. METHODS Online prospective study. Two hundred and twenty-seven undergraduate students were recruited to use an online search engine to answer six health questions. Subjects recorded their pre- and po...

OBJECTIVES To compare the validity, responsiveness to change, and user friendliness of four self completed, shoulder-specific questionnaires in primary care. METHODS A cross sectional assessment of validity and a longitudinal assessment of responsiveness to change of four shoulder questionnaires was carried out: the Dutch Shoulder Disability Questionnaire (SDQ-NL); the United Kingdom Shoulder...