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We demonstrated validity of the COPD-PS through multiple concurrent and construct approaches.
Psychometric analyses included tests of assumptions underlying the construction of SF-36 scales, analysis of principal components to test the hypothesized structure of the SF-36, and tests of construct validity using criterion-based and construct approaches.
The difficulty in finding a single agreed definition of the empathy construct has consequences for this review both in terms of structuring the review itself and in terms of defining validity; where variations exist in the definition of a construct, approaches to assessing construct, and even criterion, validity may differ markedly.
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It was up to the local authorities to construct approach roads".
Previous studies have demonstrated that porcine synovial membrane stem cells can adhere to a cartilage defect in vivo through the use of a tissue-engineered construct approach.
Moreover, a multiple construct approach applied to DDX3 has previously shown that constructs lacking the first 169 aa were perfectly expressed as soluble proteins [18].
It could, however, be considered a useful comparator instrument in a construct approach" [ 1].
Therefore the COSMIN panel proposed to consider it a construct approach of responsiveness (comparable to construct validity) if the "transition" question is used to assess responsiveness.
We chose to use the single-item approach because safety incidents are concrete factors, which are not well suited for the latent construct approach in multi-item scaling.
In order to evaluate if the MFPDI was responsive to change a construct approach was chosen by absence of a gold standard.
Responsiveness/sensitivity to change will be investigated by the construct approach recommended by De Vet et al 19 for studies with no gold standard in measurement of changes by estimating correlations of change between two similar instruments according to specific hypothesis.
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