THE INK POLYGRAPH

The polygraph and forensic psychiatry.

The Blue Fairy in Pinocchio stated confidently, “Lies can be easily recognized. There are two kinds of them: those with short legs, and those with long noses” (Ref. 1, p 89). While perhaps true for her, the Blue Fairy was wrong when it comes to humans, who are in general poor lie detectors. In experimental settings, the ability of the average person to catch a liar is typically little more than...

On "The Matching Polynomial of a Polygraph"

In this note we give an explanation for two phenomena mentioned in the concluding remarks of " The matching polynomial of a polygraph " by Babic et al. The following results are obtained: (1) Although three matrices for given polygraphs defined in the above article in general have different orders, they determine the same recurrence relations for the matching polynomial of these polygraphs. (2)...

The evaluation of the mandatory polygraph pilot

The Evolution of Polygraph Testing in the

The adoption of the polygraph instrument and its related methods and procedures were not introduced to the People's Republic of China (PRC) until late in the 20th century. Although the use of these methods was slow to begin, the use of the polygraph and its application in the day-to-day activities of many investigators at the different levels of government has grown quickly in the last decade. ...

Evaluating Polygraph Data

The objective of automated scoring algorithms for polygraph data is to create reliable and statistically valid classification schemes minimizing both false positive and false negative rates. With increasing computing power and well developed statistical methods for modeling and classification we often launch analyses without much consideration for the quality of the datasets and the underlying ...