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When evaluating item validity, it is important to study the effects of question context and wording.
One reason for evaluating item performance is to examine whether the subjects use the response categories as intended.
DIF analyses may be useful for evaluating item translations and, if DIF is found, the relevant wording may be reviewed.
A series of ranges has been suggested [ 17] to be employed when evaluating item fit depending on the type of test, however the majority of studies employ a range of 0.7 to 1.3.
An observational study was designed and conducted among patients with either COPD or asthma from the US and UK with the objective of evaluating item performance and psychometric properties of the CASIS.
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See the data from COCA in Table 8: Table 8 Frequency of Viewpoint with evaluating items in COCA no.
All topics of the program received average scores of more than four out of five points in the evaluating items.
Cut-off points for selecting relevant instrument items were arbitrarily chosen as standard cut-off points for evaluating items on a 5-point Likert scale.
Most trainees were confident or very confident in all evaluating items assessing confidence regarding smoking cessation work directly after the training program.
Item response theory (IRT) analysis models were used to evaluate item characteristics and to scale both items and individuals on the pain behavior domain.
Construct validity involves statistical analyses to evaluate item validity and relationships between instrument items.
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