A structured set of items used to obtain reports or judgments. Item wording, response options, respondent perspective and scoring determine what the resulting measurements mean. Content validity, measurement reliability and construct validity require evidence beyond a convenient scoring rule.
A seven-item anxiety symptom questionnaire used in routine outcome monitoring. It should not be assumed to capture every disorder-specific difficulty or replace a clinical assessment.[ref]
Feedback-informed treatment versus usual psychological treatment for depression and anxiety: a multisite, open-label, cluster randomised controlled trial by Jaime Delgadillo and others. Lancet Psychiatry 5, 564–572; 77 participating therapists, 2233 patients, cluster allocation and not-on-track outcomes
A nine-item depression symptom questionnaire. A score, a change score, a caseness threshold and a clinical diagnosis are distinct uses or interpretations.[ref]
Feedback-informed treatment versus usual psychological treatment for depression and anxiety: a multisite, open-label, cluster randomised controlled trial by Jaime Delgadillo and others. Lancet Psychiatry 5, 564–572; 77 participating therapists, 2233 patients, cluster allocation and not-on-track outcomes
A method for investigating how intended respondents understand an item and construct their answer, using prompts about their reasoning. It helps diagnose ambiguous terms, mismatched assumptions and unsuitable response options before large-scale data collection.
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