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Exact(9)
Poor item fit was defined as infit or outfit <0.6 or >1.4 ([ 37], p. 179).
Poor layout [ 36] or poor item order [ 37] can cause non-responses to particular items.
However, high chi-square values for about a fifth of the stroke codes were suggestive of poor item fit.
By inductive reasoning, we analyzed the GP behaviour in the consultation leading to poor item scores on the MAAS-Global.
Studies of the reasons for poor item performance that included qualitative techniques such as cognitive interviewing may have identified ways to reform problematic items or captured new concepts.
Residual SD's greater than ± 2.5 and/or significant Bonferroni-adjusted χ statistics indicate poor item fit, and residual SD's greater than ± 2.5 indicate a poorly fitting person(s).
Similar(51)
From the item analysis, six items were shown to have poor item-total correlations below 0.2.
We then conducted an item analysis of redundant items or those with poor item-to-scale correlations.
Based on their poor item-scale correlation, items 40 and 50 were removed from all the analyses, including those presented in Table 1 and 2. For identification purposes, the variance of the eight factors was set to 1.00.
Poor items were revised or discarded when preliminary item analysis indicated they were too ambiguous or otherwise unsuitable for inclusion.
The resultant items may then be explored empirically through item analysis, enabling poor items to be identified and eliminated from the final measure.
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