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Findings obtained from each step in the item generation and selection process were reviewed by the research team, including two psychometricians and two clinicians (one endocrinologist), >and provided recommendations to ensure face validity.
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Or it might be a necessary but incidental step in using the item for another purpose".
In step 2, the item pool was screened to determine: (a) the questions' applicability and relevance to military war zone experiences and culture and (b) the feasibility of objectively observing described symptoms, an attribute additionally rated by a focus group of Navy corpsmen previously deployed with Marine combat units.
In the final step of the item's representation creation, the system analyzes the feature set and checks whether they are terms or aspects.
Each block shows its step in the algorithm and the items produced there.
Whereas questions and answer alternatives were developed in the first step, the item adaption and item refinement steps were intended to optimally adapt the text of the questions and answer alternatives to the target population, to avoid ambiguities and misunderstandings, but not to select and exclude items.
This study represents the first step in the establishment of an item bank for delirium screening with potential questions for clinical researchers to select from and tailor according to their research objectives.
In the next step, the item pool was sent by e-mail to 54 experts (registered physiotherapists).
In step (b), the items were examined using the one parameter logistic item response theory model [ 26] to investigate whether the item difficulty parameter (β i ) was similar for male and female and for younger and older patients.
In step (b), the items were examined to investigate whether the value of the item difficulty parameter (β i ) was similar for male and female patients and for patients younger than 85 years and those aged 85 or older.
In the next step, the items in each domain were subjected to a multi-stage empirical pre-testing and iterative revision process [ 25].
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