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Known groups comparisons were made for the physician-rated clinical severity item (split into two groups at the median) and the CHRIs physical health and mental health items (collapsed to three levels).
This could be performed with larger data sets and/or with item split techniques [ 38].
This view is supported by the lack of improved overall fit following item split and signs of multidimensionality in the independent t-test protocol (see below).
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One possible explanation for the significant item-trait interaction statistic following item splits may be that the observed DIF were signs of multidimensionality rather than "true" DIF among these items.
Specifically, the six items split across two or three factors in the four countries.
Finally, the operational version of the scale was created with 42 items, split up into four dimensions: 15 items to measure Voluntarism, nine items to Individual Initiative, 15 items to Extra Commitment, and three items to Organizational Defense.
14 The revised STRICTA checklist comprises six items split into 17 subitems (table 1).
The OHIP psychological disability items split between the social disability and psychological discomfort subscales.
The items split into two groups, a physical-cognitive component, and a sleep-rest component.
For the PedsQL 4.0 Generic Core Scales, all items split into two different factors.
The SF-36 is a generic health status questionnaire consisting of 36 items split into 8 sections.
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CEO of Professional Science Editing for Scientists @ prosciediting.com