Responsiveness
5 important questions on Responsiveness
What is the difference between validity and responsiveness?
Responsiveness refers to validity of a change score (estimated on two measurements)
What is important for measuring responsiveness?
At least two measurements need to be taken
The design should be chosen in such a way that it could be expected that change occurs. If not it is hard to determine if instrument is faulty or patients didnt improve.
What if there is no gold standard available?
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What are inappropriate measures of responsiveness?
Paired t-test->measure of statistical significance of the change scores instead of the validity
Guyatt repsonsiveness ratio-> gives no information about validity of change scores
Validity of a change scores proves it's usefulness
When is the use of significance and effect size appropriate?
A priori defined hypotheses about the expected magnitude of effect size or changes
The question on the page originate from the summary of the following study material:
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