Jonathan A. E. Fleming

J. A. E. Fleming was a researcher affiliated with the Department of Psychology at the University of Minnesota, Minneapolis during the early-to-mid 1980s and early 1990s. Fleming collaborated primarily with William George Iacono and other members of Iacono's psychophysiology research team at Minnesota, contributing to experimental studies on the physiological detection of deception.

Fleming's research focused on countermeasures to polygraph testing, specifically investigating whether pharmacological interventions could defeat deception detection methods. In a 1984 study, Fleming examined the effects of diazepam and methylphenidate on the electrodermal detection of guilty knowledge, finding that drug status did not affect the validity of the polygraph examination. Fleming continued this line of research in the 1992 study that compared the effects of diazepam, meprobamate, and propranolol on the outcome of a guilty knowledge test (GKT), again demonstrating that drug status had no influence on the outcome of the GKT. These findings were significant in establishing that common anti-anxiety medications could not be effectively used to evade polygraph detection.

Fleming worked as part of a prolific research group led by William Iacono at the University of Minnesota, collaborating with researchers including Anthony M. Cerri and Christopher J. Patrick. This team made substantial contributions to understanding the Guilty Knowledge Test (also known as the Concealed Information Test) and established important empirical findings about polygraph validity and resistance to countermeasures. Fleming's work has been cited extensively in the deception detection literature and helped shape contemporary understanding of polygraph countermeasure effectiveness.