OBJECTIVE The aim of the present study was to evaluate whether the Dougados Functional Index (DFI) with 5-point Likert scale is sensitive enough to demonstrate the efficacy of intensive physiotherapy and exercise. METHODS Eight-one consecutive patients with spondyloarthropathy (SpA) completed self-administered questionnaires on functional analysis, the Bath Ankylosing Spondylitis Functional I...

Context: Psychosocial exposures commonly show large variation over time and are usually assessed using multiitem Likert indices. A construct requiring a five-item Likert index could possibly be replaced by a single visual analogue scale (VAS). Objective: To: a) evaluate validity and relative reliability of a single VAS compared to previously validated Likert based items and indices measuring th...

PURPOSE To compare the responses related to vocal symptoms in two versions of the Vocal Production Condition - Teacher (CPV-T) questionnaire, with responses on a Likert scale and a Visual Analog Scale (VAS), in order to evaluate which is the best measurement method. METHODS A cross-sectional observational study was conducted with teachers with voice disorders during the period from July 2011 ...

Using data from the PISA 2006 field trial, Rasch item response models are used to demonstrate that extreme response tendency was exhibited differentially across culturally distinct countries when answering Likert type attitude items. A single attitude scale is examined across eight culturally distinct countries in this paper. Two avenues to ameliorate this tendency are explored: first using dic...