Four scales met IRT standards for ascertaining item hierarchy at the individual level, as opposed to merely establishing item hierarchy at the population level.
Self-reported depression and arthritis were ascertained using items from the Self-Administered Comorbidity Questionnaire (SACQ), a reliable and valid comorbidity measure that is widely used in orthopedic research [ 23].
A senior government source speaking to the Press Association Wednesday suggested this was not a follow-up attack but rather a case of cross-contamination. "They [the authorities] have never been able to ascertain the item used to deposit the Novichok, and it's possible the pair have come into contact with that item," the source said.
A standard questionnaire is administered in person or by telephone to ascertain food items consumed in the 2 months before onset of illness, including food items previously identified as vehicles in outbreaks and foods that have been previously found to be contaminated by L. monocytogenes and typically consumed uncooked.
Specialized training was ascertained by the item: "Please check the areas [major psychiatric, alcohol/drug, children 0-12, adolescents 13-17, and marital/family] in which you have at least 1500 hours of training and experience and wish to provide services.
Potential DIF is ascertained for each item by comparing the standardized residuals between the countries and across the latent trait continuum of QoL using a two-way analysis of variance (ANOVA).
The final translation was examined by an expert panel consisting of clinicians and researchers to ascertain the items are culturally relevant and can be correctly understood by the Chinese participants.
Potential prevalent cases of non-fatal myocardial infarction were ascertained by questionnaire items on chest pain [55] and the physician's diagnosis of a heart attack.
They independently ascertained whether the items corresponded with Moos' theoretical framework.
Consumption of beer, wine, and liquor was ascertained in separate items.
The first items ascertained the treatment with physiotherapy for PD in the past year to satisfy our inclusion criteria.
