Physical therapists measure joint range of motion (ROM) to assess the clinical manifestations of pathokinesiology. Whether physical therapists have the tools and skills to effectively choose their degree of precision, is the question that reliability of joint measurement studies have sought to clarify. The physical therapy profession continues to search for standardized methods of joint measurement with clinically significant interrater reliability. This study compared the interrater reliability of passive ankle dorsiflexion ROM utilizing the universal goniometer and a force produced by a dynamometer or an endfeel. The results showed a significant increase in interrater reliability when raters used a known force. Additionally, a standardized protocol also improved interrater reliability.
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