The purpose of this study was to review various physical activity measures, both subjective and objective. The activity measures were then evaluated for their ability to aid in research and practice.

The National Academies of Sciences, Engineering, and Medicine are private, nonprofit institutions that provide expert advice on some of the most pressing challenges facing the nation and world. Our ...

AFTER working through the experiments described in this volume, a student will have a thorough knowledge of the instruments and methods employed in physical measurement, and will be in a position to ...

Those of us in the business of psychological measurement use the terms reliability and validity a lot. You've probably seen those terms on the Psychology Today website (they appear thousands of times) ...