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These authors are developing a tinnitus functional index questionnaire, specifically to have high discriminative and evaluative validity for the assessment of tinnitus treatment outcome.
Although the evaluative validity of the QLMI was not as robust as its discriminative validity [ 17], the responsiveness of the instrument has since been demonstrated in a number of studies [see the section on responsiveness below].
A priori hypotheses to determine the discriminative and evaluative validity of the items in the QLMI were tested against several well established clinical measures [e.g. State-Trait Anxiety Inventory, Beck Depression Inventory, Profile of Mood Scale, Time Trade-off, Quality of Well-Being, Katz social functioning instrument, and a symptom limited exercise test].
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The evaluative [longitudinal] validity, i.e., responsiveness, of the MacNew has been tested with three different effect size statistics, the effect size statistic [ES], the standardized response mean [SRM], and the responsiveness statistic [RS].
However, there is a lack of evidence for the discriminative, evaluative and predictive validity of these tools when administered prior to term, limiting their use in clinical practice and research with preterm infants while in the Neonatal Intensive Care Unit (NICU).
Although this evaluative approach addresses the validity of the specific models induced in an experiment, it falls short of evaluating the inductive method itself.
A review of existing PROs used in MDD suggested the need to conduct qualitative research with patients with MDD to better understand their experience of MDD and develop an evaluative instrument with content validity.
PAQLQ has been shown to have good measurement properties and high validity in both evaluative and discriminative studies [ 20].
validity as an evaluative tool was tested in a group of 50 patients with disorders of the rotator cuff (DRC) who reported that their symptoms had changed.
Messick [ 21] defined validity as "an integrated evaluative judgment of the degree to which empirical evidence and theoretical rationales support the adequacy and appropriateness of inferences and actions based on test scores and other modes of assessment".
The instrument was developed following in-depth interviews with patients and was assessed against criteria necessary for a self-reported instrument that will be used as an outcome measure within randomised trials and other forms of evaluative research including data quality, reliability, validity and responsiveness to change [ 10].
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