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Known-group, convergent and discriminant validity are all measures of construct validity.
This can result in shared variance, which may inflate measures of construct validity.
Measures of construct validity included test item analyses, internal test consistency, and expert faculty biology evaluations of instrument items.
The EQ-5D appears to be a reasonable instrument to use in this population when considering the psychometric measures of construct validity, responsiveness and reliability.
The acceptability and feasibility of the EQ-5D is well established and is not expected to be significantly different for this population, so the review was limited to measures of construct validity, reliability and responsiveness.
Different terms are used in the literature to describe validity, and in this context, discriminant validity refers to the degree with which the instrument discriminates between groups with known differences, and convergent validity refers to the degree to which two theoretically related measures of construct are actually related.
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Our hypothesis was that the WOSI score would agree better with the subjective VAS scale of shoulder function than with the overall health measurement by the EQ-5D as a measure of construct validity.
This method allowed an estimate of relative levels of construct in the "low" expression or "lateral" domain relative to the "high" domain, as it considered these to be a proportion of 1. Thus the method allows a measure of construct stability, as the least stable constructs will be absent from the lateral domains of expression in which dppGAL4 expression is lower.
A measure of construct validity was determined by estimating κ between the two imaging modalities in the detection of osteophytes.
It is an important measure of construct validity, which is commonly examined through the "known groups" technique [ 30].
The DSQ was able to detect changes in symptoms over time and produced similar outcomes to those from physician- and other patient-rated measures, supportive of construct validity.
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