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Exact(3)
The fourth column is the rating scale of the items.
(See Table 1. for the scale of the items for the propensity to adopt evidence-based practice).
As to the item selection, the first 6 items explained 92% of the variance, 3 were the same as in the DOXA sample, while the other 3 were different but pertaining the same scale of the items present in the DOXA sample.
Similar(57)
In addition, the ordinal scaling of the items is inadequate for the economic evaluation of treatment alternatives.
While the SON-R was well accepted by the children and Nordoff-Robbins items were scored by the therapist, completing the SETK with the children was difficult, yielding to incomplete items in the SETK subscales (between 14% (VS-Scale) and 36% (GW-Scale) of the items).
For the factor analysis we used the original scales of the items.
To study this effect, they were able to eliminate the effect of guessing by a scaling of the items which estimated their relative difficulties.
The interval properties of the response scales of the items in the PBSI were such that a simple index based on assigning values to levels and summing could be used for comparative purposes.
Twenty-two items could be answered with "na", which makes the scale of these items a multi-categorical nominal scale.
So, within scales, items were weighted equally, regardless of the number of scale points of the items.
So within scales, items were weighted equally, regardless of the number of scale points of the items (e.g., 0-1 vs. 0-2, etc).
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com