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 ...

Food labels may have an important function in communicating nutrition information and have considerable potential to influence food choice and dietary behaviour. Questionnaire content was determined ...

Background: Self-report questionnaires play an important role as outcome measures in shoulder research. Having an estimate of the measurement error of these ...

In my previous blog post, I noted that reliability and validity are two essential properties of psychological measurement. Measures of intelligence, personality, vocational interests, and so forth ...

The forward and back translation of OSS revealed no difficulties. Item 17 in WORC (How much difficulty do you have "roughhousing or horsing around" with family or friends?) and item 20 (How "down in ...