and an additional 5 articles reported measurement of physical symptoms as a component of quality of life measures. Separate scales were developed to measure the child's fatigue from the ...

Despite extensive use over 40 years, physical activity questionnaires still show limited reliability and validity. Measurements have value in indicating conditions where an increase in physical ...

The measurement of the growth of national economies is a surprisingly ... Invented in the manufacturing age "as a way of totting up mainly physical production, GDP is less and less useful for ...