With the increased use of computerized adaptive testing, which allows for continuous testing, new concerns about test security have evolved, one being the assurance that items in an item pool are safeguarded from theft. In this paper, the risk of score inflation and procedures to detect test takers using item preknowledge are explored. When test…

This paper reviews the basic elements of the EM approach to estimating item parameters and illustrates its use with one simulated and one real data set. In order to illustrate the use of the BILOG computer program, runs for 1-, 2-, and 3-parameter models are presented for the two sets of data. First is a set of responses from 1,000 persons to five…

This book discusses tricks for answering questions on the Law School Admission Test (LSAT). The tricks are based on an analysis of 12 editions of the LSAT which have been made public pursuant to New York's Truth in Testing Law. Sample LSAT questions published by the Law School Admission Council are referenced to exemplify the tricks' applications…