![]() In this section, the four main types of validity (face validity, content validity, criterion-related validity, and construct validity) are discussed as they relate to the measurement of joint motion. The joint angle obtained from a goniometric measurement is used to describe a specific joint position or, if a beginning and ending joint position are compared, a range of motion (ROM). Therefore, a valid goniometric measurement is one that represents the actual joint angle and one that can provide data for use in clinical decision-making. The purpose of goniometry is to measure the angle created at a joint by the adjacent bones of the body. 63 The testing procedure is similar to that performed in the. The goniometer provided greater hip ROM values compared to the ETS (range 2.0-18.9 degrees P < 0. , 3 Goniometry reliability and validity of lower. This method of assessment is valid and reliable (inter-rater and intra-rater reliabilitiesall >0.99 and >0.98, respectively). Validity is "the degree to which a useful (meaningful) interpretation can be inferred from a measurement." 1 Stated in another way, the validity of a measurement refers to how well the measurement represents the true value of the variable of interest and how well this measurement can be used for a specific purpose. 383f tying shoes, 383f knee joint, 426, 427-430t flexion of knee. For goniometry to provide meaningful information, measurements must be valid. ![]()
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