Sorting Guilty Minds
Francis X. Shen
University of Minnesota Law School
Morris B. Hoffman
Second Judicial District Court Judge, State of Colorado
Owen D. Jones
Vanderbilt University - Law School & Dept. of Biological Sciences
Joshua D. Greene
Harvard University - Department of Psychology
Vanderbilt University - Department of Psychology
Center for Integrative and Cognitive Neuroscience
June 2, 2011
New York University Law Review, Vol. 86, 2011
Because punishable guilt requires that bad thoughts accompany bad acts, the Model Penal Code (MPC) typically requires that jurors infer the past mental state of a criminal defendant. More specifically, jurors must sort that mental state into one of four specific categories - purposeful, knowing, reckless, or negligent - which in turn defines the nature of the crime and the extent of the punishment. The MPC therefore assumes that ordinary people naturally sort mental states into these four categories with a high degree of accuracy, or at least can reliably do so when properly instructed. It also assumes that ordinary people will order these categories of mental state, by increasing amount of punishment, in the same severity hierarchy that the MPC prescribes.
The MPC, now turning 50 years old, has previously escaped the scrutiny of comprehensive empirical research on these assumptions underlying its culpability architecture. Our new empirical studies, reported here, find that most of the mens rea assumptions embedded in the MPC are reasonably accurate as a behavioral matter. Even without the aid of the MPC definitions, subjects were able to regularly and accurately distinguish among purposeful, negligent, and blameless conduct. Nevertheless, our subjects failed to distinguish reliably between knowing and reckless conduct. This failure can have significant sentencing consequences in some types of crimes, especially homicide.
Number of Pages in PDF File: 55
Keywords: Mental states, criminal law, Model Penal Code, MPC, empirical, punishment, sentencing, blame, culpability, mens rea, purposeful, knowing, reckless, negligent, responsibility, crime, criminology, retribution, just deserts, blameworthiness, intentionality, law and psychology, juror decision makingAccepted Paper Series
Date posted: February 24, 2011 ; Last revised: November 14, 2011
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