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Finally, feedback concerning the alternate wording options resulted in deletion of items asking respondents to "rate" the severity of each symptom concept presented.
This lead to further deletion of items following the procedure described above, which quickly revealed all four Planning items as obsolete.
The deletion of items was further supported by the Rasch analysis.
We had to make decisions about deletion of items based on expert review and statistical performance.
Deletion of items was considered an invasive strategy, as it alters the instrument from its original version.
After deletion of items with Kappa values less than 0.6, 120 items were selected for the preliminary study.
Similar(47)
However, the results suggested that deletion of item 5 would increase the overall Cronbach's α of 0.01.
The best solution was obtained by the deletion of item 11 (I found myself getting agitated) (p =.01).
The deletion of item 4 in the assessment of item characteristics and reliability yielded an increase in the SDSCA-G scalecale's alpha coefficient.
Deletion of item 16 did improve the internal consistency coefficient of the total scale by only 0.008, so it was included in the analysis.
Thus, CTT and IRT analyses in the revaluation phase led to deletion of item THD3 (Are you satisfied with your medical expenses?) (see Table 5).
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com