Elio Conte
Correspondence should be addressed, tel. and fax (39) 080 5478414.
Department of Pharmacology and Human Physiology – TIRES – Center for Innovative Technologies for Signal Detection and Processing, University of Bari, Italy
School of Advanced International Studies for Applied Theoretical and Non Linear Methodologies of Physics, Bari, Italy
Andrei Yuri Khrennikov
International Center for Mathematical Modeling in Physics and Cognitive Sciences, MSI, University of Växjö, S–35195, Sweden
Orlando Todarello
Department of Neurological and Psychiatric Sciences, University of Bari, Italy
Antonio Federici
Department of Pharmacology and Human Physiology – TIRES – Center for Innovative Technologies for Signal Detection and Processing, University of Bari, Italy
Leonardo Mendolicchio
Department of Mental Health, University of Foggia, Italy
Joseph P. Zbilut
Department of Molecular Biophysics and Physiology, Rush University Medical Center, 1653 W, Congress, Chicago, IL 60612, USA

Received November 15, 2008

Processes undergoing quantum mechanics exhibit quantum interference effects. In this case, quantum probabilities result to be different from classical ones because they contain an additional so-called quantum interference term. We use ambiguous figures to analyse if during perception-cognition by human subjects we can observe violation of the classical probability field and the presence of quantum interference. The experiments, conducted on a group of 256 subjects, evidence that we indeed have such a quantum effect. Therefore, mental states, during perception and cognition of ambiguous figures, appear to follow quantum mechanics.