This book deals with a controversial area of the use of the polygraph technique in legal detection work. It is based on the assumption that deception is associated with psychophysiological correlates such as changes in respiration, heartbeat, blood pressure, and electrodermal and muscular activity. Measures of these functions are variously recorded on a polygraph, whence the name of the technique. The book is primarily a manual for instruction in the use and interpretation of polygraph data, and as such it fills a long-felt void.
It begins with a short history of the development of psychophysiological measurements, and the name of Dr. Chester Darrow, one of the pioneers in galvanic skin response work, is conspicuous in its absence. Dr. Darrow was particularly aware of the difficulties in interpreting records of psychophysiological activity; he did not feel, therefore, that the technique was sufficiently reliable