@conference {2108, title = {Optimal Calibration Designs for Computerized Adaptive Testing}, booktitle = {Annual Conference of the International Association for Computerized Adaptive Testing}, year = {2011}, month = {10/2011}, abstract = {

Optimaztion

How can we exploit the advantages of Balanced Block Design while keeping the logistics manageable?

Homogeneous Designs: Overlap between test booklets as regular as possible

Conclusions:

}, keywords = {balanced block design, CAT, item calibration, optimization, Rasch}, author = {Angela Verschoor} } @conference {2105, title = {A Test Assembly Model for MST}, booktitle = {Annual Conference of the International Association for Computerized Adaptive Testing}, year = {2011}, month = {10/2011}, abstract = {

This study is just a short exploration in the matter of optimization of a MST. It is extremely hard or maybe impossible to chart influence of item pool and test specifications on optimization process. Simulations are very helpful in finding an acceptable MST.

}, keywords = {CAT, mst, multistage testing, Rasch, routing, tif}, author = {Angela Verschoor and Ingrid Radtke and Theo Eggen} } @article {363, title = {The initial development of an item bank to assess and screen for psychological distress in cancer patients}, journal = {Psycho-Oncology}, volume = {16}, number = {8}, year = {2007}, note = {10.1002/pon.1117Journal; Peer Reviewed Journal; Journal Article}, pages = {724-732}, abstract = {Psychological distress is a common problem among cancer patients. Despite the large number of instruments that have been developed to assess distress, their utility remains disappointing. This study aimed to use Rasch models to develop an item-bank which would provide the basis for better means of assessing psychological distress in cancer patients. An item bank was developed from eight psychological distress questionnaires using Rasch analysis to link common items. Items from the questionnaires were added iteratively with common items as anchor points and misfitting items (infit mean square > 1.3) removed, and unidimensionality assessed. A total of 4914 patients completed the questionnaires providing an initial pool of 83 items. Twenty items were removed resulting in a final pool of 63 items. Good fit was demonstrated and no additional factor structure was evident from the residuals. However, there was little overlap between item locations and person measures, since items mainly targeted higher levels of distress. The Rasch analysis allowed items to be pooled and generated a unidimensional instrument for measuring psychological distress in cancer patients. Additional items are required to more accurately assess patients across the whole continuum of psychological distress. (PsycINFO Database Record (c) 2007 APA ) (journal abstract)}, keywords = {3293 Cancer, cancer patients, Distress, initial development, Item Response Theory, Models, Neoplasms, Patients, Psychological, psychological distress, Rasch, Stress}, isbn = {1057-9249}, author = {Smith, A. B. and Rush, R. and Velikova, G. and Wall, L. and Wright, E. P. and Stark, D. and Selby, P. and Sharpe, M.} }