b The following items had very low communalities: item 10 on the child control subscale, item 41 on the Modeling subscale, and item 39 on the Teaching nutrition subscale.
PAM13-I works very well as a measure of activation with all items having very good psychometric properties and item difficulty calibrating very similar to the original PAM 13.
In the subgroup with mild dementia, all items had very high difficulty indices of more than.83 – the tasks were very easy for the subjects to perform – and correspondingly low discrimination power of less than.37 (see Table 2).
We believe that these items had very large confidence intervals due to the low percentage of respondents who were working (37%) and the smaller number of subjects who answered each of these questions.
Although we tried to build a scale for the items related to the social network of support, as well as for those in the health service utilisation dimension, these items had very low Cronbach's alpha values and were therefore left disaggregated.
For Feature 4 (altered level of consciousness-observational), the second factor showed all items having very low information content at the 50th percentile, so for this feature, we made our decision based on the 75th percentile in the CAM feature positive group.
Although there are a number of items, which have very similar item parameters or content, there is no need to reduce the number of items further.
As Informant C remarked, 'it was virtually infeasible to call a training session since all of our item writers have very tight schedules within their own affiliations.' Two boards reported they didn't provide feedback to item writers (Q2.6), but when asked the reasons why feedback was not provided, their explanations were vague.
Some items have a very British feel: 5,000 tins of pineapple, 9,840 tins of sardines and 10,080 tins of corned beef.
Patience is key, high value items have a very low drop rate.
