The main aim of this study was to assess the reliability and validity of a food frequency questionnaire with 23 food groups (I-FFQ) among a sample of 9–11-year-old children from three different ...

chw.edu.au Objective—To assess the test-retest reliability and validity of the physical activity questions in the World Health Organisation health behaviour in schoolchildren (WHO HBSC) survey.

Objective: To evaluate the reliability and validity of a brief physical activity assessment tool suitable for doctors to use to identify inactive patients in the primary care setting. Methods: ...

What Effect Does Having a Larger Sample Size for Some Vehicles Compared With Others Have on the Validity of the Reliability Data? Given an appropriate sample, the more data you have, the more ...

The National Academies of Sciences, Engineering, and Medicine are the nation's pre-eminent source of high-quality, objective advice on science, engineering, and health matters. Top experts participate ...

How can foreigners check the validity and reliability of UAE entry permits and e-Visas? The Federal Authority for Identity and Nationality, Customs and Ports Security answers this question. The ...