The Pittsburgh Sleep Quality Index (PSQI) is a self-rated questionnaire that is widely used by researchers to measure overall sleep quality. It consists of 19 questions that assess different aspects of sleep, such as bedtime, sleep duration, sleep disturbances, and daytime dysfunction. The scores from these questions are then combined to yield a global score, which ranges from 0-21, with higher scores indicating poorer sleep quality.
Harmony is an AI tool which uses Large Language Models to automatically match items from different questionnaires, even across different languages. You can try Harmony here: https://harmonydata.ac.uk/app. Harmony is also available as a Python and R package.
You may also be interested in Harmony Meta, our new discovery engine that helps you search through vast catalogues of study metadata to identify the variables you need for your research.
