What statistical collusion detection techniques does use?
uses five separate methods of detecting collusion. Each of these was developed by academic researchers prior to the development of , and each has been published and peer-reviewed in academic research literature. All methods used by examine all possible pairs of examinees. The detailed statistical aspects of the methods are complex; therefore those interested in the specific technical details of the methods are encouraged to explore the academic references cited. It is recommended that clients not familiar with statistical methods related to collusion detection request assistance from knowledgeable colleagues in the area of statistical methods. Brief descriptions of the five statistical collusion detection methods used by are given below. Angoff’s (1974) B-index – This method compares the number of identically incorrect responses for all pairs of examinees who fall into similar intervals of test performance (i.e., intervals are based on multiplying the number of incorrect responses for
