Data were abstracted into a standard data abstraction form covering general information about the instrument such as the name and source, the study setting (country, type of hospital and population), purpose, the way the instrument is administered to participants, items and scoring of items and subscales.
Cronbach's alpha was 0.95 for the quality of GTA PD items administered to the present sample, with corrected item-total item correlations ranging from 0.63 to 0.81.
In the initial stage, a pilot test was administered to adopt anchor items that could link several test forms.
New contextualized Icelandic items were written resulting in a combined 89-item measure of international and indigenous items administered to a sample of 1249 university students.
CAT assessments initially reduced the number of items administered to 19 and 14 per patient for the first and second item banks.
Though the number of items administered to each simulee was the same across the two conditions, median CAT item usage was lower (Med=504) in the 2PL than in the 1PL (Med=586) condition.
Three of these content domains cognitive, language and motor are assessed by items administered to the child, whereas the socialemotional and adaptive behaviour domains are based on information supplied by the primary care giver to items contained in a separate questionnaire.
A test of (K) dichotomously scored items administered to N examinees yields a (NxK) matrix of zeros and ones from which one can estimate the parameters of the (K) items and the values of the latent trait for the (N) examinees.
The skill values associated with a respondent are estimated by applying a country-specific, IRT/latent regression model that combines information from the respondent's answers to the cognitive items administered to her with the respondent's background information (von Davier et al. 2007; OECD 2013a).
Network support items administered to the HCS and ARMHS cohorts at baseline and jointly administered to the HCS three year follow-up are presented in Table 1.
Personal support items administered to the HCS and ARMHS cohorts at baseline and jointly administered to the HCS three year follow-up are presented in Table 1.
