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If, however, the same item was administered at the 45th position (i.e., the last question) on the test, then the estimated difficulty of the item would become (- 3.244 + (45 *.037) = - 1.579).
With respect to the number of times a given item was administered by CAT CATT item usage), the median number of item administrations across items and simulation conditions is 553 (IQR = 119 1318).
Correct Detection of Mode Effects = true positive detection of mode DIF among items simulated with mode DIF; AUC = area under the ROC curve; CI = 95% confidence interval; IRT = item response theory model used to generate response data and parameters used in CAT; CAT item usage = number of times a given item was administered by CAT divided by 100; * p <.05; ** p <.01.
Incorrect detection of mode effects = False positive identification of DIF due to mode among items not simulated with mode DIF; AUC = area under the ROC curve; CI = 95% confidence interval; IRT = item response theory model used to generate response data and parameters used in CAT; CAT item usage = number of times a given item was administered by CAT divided by 100; * p <.05; ** p <.01.
Similar(56)
Secondly, the selected item is administered, i.e., presented, to the examinee.
The frequency an item is administered by CAT could therefore form the basis of power analysis conducted prior to DIF analysis for a given item.
In the simulated CAT, responses for 10000 patients derived from the RUMMss simulation program [ 57] were taken to represent the responses the patient would have given, had the item been administered in the context of a CAT.
In the study, an instrument consisting of 30 items was administered to parents and their children.
The study had a survey research design and a test consisting of open-ended items was administered for data collection.
Then Oxford's Strategy Inventory for Language Learning SILLL version 7.0 for ESL/EFL learners, 50 items) was administered.
During each clinical examination, the aforementioned semi-structured interview, with the checklist of 20 items, was administered to all participants.
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