How to ask about patient satisfaction? The visual analogue scale is less vulnerable to confounding factors and ceiling effect than a symmetric Likert scale - Voutilainen - 2015 - Journal of Advanced Nursing - Wiley Online Library
To study the effects of scale type (visual analogue scale vs. Likert), item order (systematic vs. random), item non-response and patient-related characteristics (age, gender, subjective health, need for assistance with filling out the questionnaire and length of stay) on the results of patient satisfaction surveys. Login using your SSSFT NHS OpenAthens for full text. SSOTP - request a copy of the article from the library - www.sssft.nhs.uk/library
