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Individual components of compound criteria may differ in measurement properties; therefore pooling information from such divergent items will reduce information about the AUD construct.
Consequently, we checked the items for compliance with the Rasch model and excluded divergent items.
Therefore, item adequacy (i.e., degree to which items were associated with their hypothesized scales) was assessed using internal consistency (coefficient alpha) and by reviewing the pattern of convergent and divergent item-to-scale correlations.
A consensus was reached after discussion on divergent items.
Moving forward, the MPAA will continue to work with all parties, including the blind community, to overcome these divergent agenda items with the ultimate objective of developing a treaty that meets the goals of everyone involved.
Convergent validity was assessed by estimating Spearman correlation coefficients for items comprising each domain, and divergent validity across items of different domains.
The internal consistency reliability of the instrument was measured by Cronbach's α, and the convergent and divergent validity of items were assessed by item-domain correlation coefficients.
A threshold of 0.40 was used, proposed by Karlsson et al.[ 25] Low item divergent validity was indicated if an item correlated higher with any other scale than with the own scale.
To test the unidimensionality of the CES-D13 scale, a Principal Components Analysis of the residuals was conducted to identify the two most divergent subsets of items as indicated by positive and negative loading items on the first component extracted.
This allowed detection of errors and divergent interpretations of items with ambiguous meanings.
To test the unidimensionality of the 13-item CES-D scale, a principal component analysis was conducted on the residuals in order to identify the two most divergent subsets of items as indicated by positive loadings (Set 1) and negative loadings (Set 2) on the first factor (Table 2).
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