ABSTRACT
Polygraph records conducted with the control question test are usually interpreted according to one of two main methods. Many polygraph records exhibit a small difference between the number of positive and negative scores and the use of raw scores sums may lead to a decision based on a record which is not clear enough. The problem is not acute for short records since the raw scores sum will probably be assigned to the inconclusive region. Records with many comparison points and a small difference between the percentages of positive and negative scores, increase the probability that the raw score sum will fall in a decision region. To overcome the problem, the raw score sum was replaced with the mean score per comparison point (MCP). The MCP is considered as a single score assigned by one scorer to one comparison of responses to adjacent relevant and control questions in a single physiological measure.
