Some of the most frequent errors may be caused by ...

misinterpretation of the data on the charts


lack of training and experience of the polygraph examiner


counter-measures from the examinee
a lack of quality control review


equipment malfunction


failure to properly prepare the examinee for the examination


poorly worded test questions


improper assessment of the examinee's emotional and physical condition ·


improper use of testing techniques

Why Critics Figures Vary

(the following if from the American Polygraph Association)

"One of the problems in discussing accuracy figures and the differences between the statistics quoted by proponents and opponents of the polygraph technique is the way that the figures are calculated. At the risk of over simplification, critics, who often don't understand polygraph testing, classify inconclusive test results as errors. In the real life setting an inconclusive result simply means that the examiner is unable to render a definite diagnosis. In such cases a second examination is usually conducted at a later date."

California based agency, local to Southern Califiornia, especially the Los Angeles, Orange County, Riverside, San Gabriel Valley, Pomona Valley, San Bernardino, and Big Bear Areas.