Measurement validity in physical therapy research.

  title={Measurement validity in physical therapy research.},
  author={Julius Sim and Paula Y Arnell},
  journal={Physical therapy},
  volume={73 2},
  pages={102-10; discussion 110-5}
This article considers the role of measurement validity within physical therapy research. The concept of measurement validity is identified as a component of internal validity, and it is differentiated from the notion of reliability; these concepts are related to systematic and random sources of error, respectively. Using examples from physical therapy and rehabilitation, four main types of validity are reviewed: face validity, criterion-related validity, content validity, and construct… CONTINUE READING


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