Systematic investigations into the structure of measurement error of physical activity questionnaires are lacking. We propose a measurement error model for a physical activity questionnaire that uses physical activity level (the ratio of total energy expenditure to basal energy expenditure) to relate questionnaire-based reports of physical activity level to true physical activity levels. The 19...

A majority of performance measurements have used input and outcome data to assess project performance in past research. Each performance criterion of input and outcome, however, should have different importance in performance measurement according to the character and objective of the project. Unfortunately, there has been relatively little research on criterion of project performance measureme...

Systematic investigations into the structure of measurement error of physical activity questionnaires are lacking. We propose a measurement error model for a physical activity questionnaire that uses physical activity level (the ratio of total energy expenditure to basal energy expenditure) to relate questionnaire-based reports of physical activity level to true physical activity levels. The 19...