Because each questionnaire was checked for item non-response at the community health service by a trained research assistant, the number of people with missing items for both the positive and negative experiences of social support was low (2.9%).
Check for items that may no longer be good.
Instead you'll be checking for items that are smaller and make more of a bold, singular statement.
Check for items under the bed or under a chair that may have been used as a flat surface for snorting.
Those parameter estimates are not used for anything beyond this particular analysis, although eventually they could be used to check for item parameter drift over time.
Statistics of both parts of the study A reliability analysis of all 12 items of the ICS was carried out for all participants of study 1 with SPSS 15.0 to check for item-item and item-total-correlation of r ≥ 0.40 and a Cronbach's-α-reliability of r ≥ 0.70.
To prepare data for principal component analysis and item reduction, items were checked for inter-item correlation, as this would suggest redundancy.
Scales were checked for missing items and patients were asked to complete the missing items.
Questionnaires were routinely checked for missing items.
Facility, Point Biserial, Rasch Difficulty and Weighted Mean Square Fit are checked for individual items.
