Irrationality and decision-making

What exactly happens when people make perceptual decisions under conditions of uncertainty? Does making a decision eliminate uncertainty or does the act of making a decision in itself construct the perceptual process in question, perhaps analogous to the way in which making decisions shapes preferences? Classical models presuppose that a given system is consistently in a specific state, even though the observers’ cognition of this state might be uncertain. In this project we explore an alternative approach inspired by quantum mechanics, namely that taking a physical measurement of a physical system actively creates rather than passively records the property under investigation.

Read more: Quantum Dice - When Albert Einstein was inspired by Satyendra Nath Bose


Prof Geetika Tankha; Manipal University Jaipur, India; Psychophysics experiments in visual and auditory perception.

Manipal University Jaipur

Research Fellow
Christopher Germann

Further Reading
  • Pothos, E. M., & Busemeyer, J. R. (2013). Can quantum probability provide a new direction for cognitive modeling. Behavioral and Brain Sciences, 36, 255-274. DOI: 10.1017/S0140525X12001525

  • Pothos, E. M., & Busemeyer, J. R. (2009). A quantum probability explanation for violations of ‘rational’decision theory. Proceedings of the Royal Society, 276(1665), 2171-2178. DOI: 10.1098/rspb.2009.0121