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Law and Psychology

University of Pennsylvania Carey Law School

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Internal And External Challenges To Culpability, Stephen J. Morse Jan 2022

Internal And External Challenges To Culpability, Stephen J. Morse

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This article was presented at “Guilty Minds: A Virtual Conference on Mens Rea and Criminal Justice Reform” at Arizona State University’s Sandra Day O’Connor College of Law. It is forthcoming in Arizona State Law Journal Volume 53, Issue 2.

The thesis of this article is simple: As long as we maintain the current folk psychological conception of ourselves as intentional and potentially rational creatures, as people and not simply as machines, mental states will inevitably remain central to ascriptions of culpability and responsibility more generally. It is also desirable. Nonetheless, we are in a condition of unprecedented internal challenges to …


Against The Received Wisdom: Why The Criminal Justice System Should Give Kids A Break, Stephen J. Morse Jul 2019

Against The Received Wisdom: Why The Criminal Justice System Should Give Kids A Break, Stephen J. Morse

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Professor Gideon Yaffe’s recent, intricately argued book, The Age of Culpability: Children and the Nature of Criminal Responsibility, argues against the nearly uniform position in both law and scholarship that the criminal justice system should give juveniles a break not because on average they have different capacities relevant to responsibility than adults, but because juveniles have little say about the criminal law, primarily because they do not have a vote. For Professor Yaffe, age has political rather than behavioral significance. The book has many excellent general analyses about responsibility, but all are in aid of the central thesis about …


Mental Disorder And Criminal Justice, Stephen J. Morse Jan 2018

Mental Disorder And Criminal Justice, Stephen J. Morse

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This paper is a chapter that will appear in REFORMING CRIMINAL JUSTICE: A REPORT OF THE ACADEMY FOR JUSTICE BRIDGING THE GAP BETWEEN SCHOLARSHIP AND REFORM (Erik Luna ed., Academy for Justice 2018). The criminal law treats some people with severe mental disorders doctrinally and practically differently at virtually every stage of the criminal justice process, beginning with potential incompetence to stand trial and ending with the question of competence to be executed, and such people have special needs when they are in the system. This chapter begins by exploring the fundamental mental health information necessary to make informed judgements …


How Should Justice Policy Treat Young Offenders?, B J. Casey, Richard J. Bonnie, Andre Davis, David L. Faigman, Morris B. Hoffman, Owen D. Jones, Read Montague, Stephen J. Morse, Marcus E. Raichle, Jennifer A. Richeson, Elizabeth S. Scott, Laurence Steinberg, Kim A. Taylor-Thompson, Anthony D. Wagner Feb 2017

How Should Justice Policy Treat Young Offenders?, B J. Casey, Richard J. Bonnie, Andre Davis, David L. Faigman, Morris B. Hoffman, Owen D. Jones, Read Montague, Stephen J. Morse, Marcus E. Raichle, Jennifer A. Richeson, Elizabeth S. Scott, Laurence Steinberg, Kim A. Taylor-Thompson, Anthony D. Wagner

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The justice system in the United States has long recognized that juvenile offenders are not the same as adults, and has tried to incorporate those differences into law and policy. But only in recent decades have behavioral scientists and neuroscientists, along with policymakers, looked rigorously at developmental differences, seeking answers to two overarching questions: Are young offenders, purely by virtue of their immaturity, different from older individuals who commit crimes? And, if they are, how should justice policy take this into account?

A growing body of research on adolescent development now confirms that teenagers are indeed inherently different from adults, …


Addiction, Choice And Criminal Law, Stephen J. Morse Jan 2017

Addiction, Choice And Criminal Law, Stephen J. Morse

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This chapter is a contribution to a volume, Addiction and Choice, edited by Nick Heather and Gabriel Segal that is forthcoming from Oxford University Press. Some claim that addiction is a chronic and relapsing brain disease; others claim that it is a product of choice; yet others think that addictions have both disease and choice aspects. Which of these views holds sway in a particular domain enormously influences how that domain treats addictions. With limited exceptions, Anglo-American criminal law has implicitly adopted the choice model and a corresponding approach to responsibility. Addiction is irrelevant to the criteria for the …


Law, Responsibility, And The Sciences Of The Brain/Mind, Stephen J. Morse Apr 2016

Law, Responsibility, And The Sciences Of The Brain/Mind, Stephen J. Morse

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This chapter is a submission to the Oxford Handbook of Law and the Regulation of Technology edited by Roger Brownsword. It considers whether the new sciences of the brain/mind, especially neuroscience and behavioral genetics, are likely to transform the law’s traditional concepts of the person, agency and responsibility. The chapter begins with a brief speculation about why so many people think these sciences will transform the law. After reviewing the law’s concepts, misguided challenges to them, and the achievements of the new sciences, the chapter confronts the claim that these sciences prove that we are really not agents and that …


Predicting The Knowledge–Recklessness Distinction In The Human Brain, Iris Vilares, Michael J. Wesley, Woo-Young Woo-Young Ahn, Richard J. Bonnie, Morris B. Hoffman, Owen D. Jones, Stephen J. Morse, Gideon Yaffe, Terry Lohrenz, Read Montague Jan 2016

Predicting The Knowledge–Recklessness Distinction In The Human Brain, Iris Vilares, Michael J. Wesley, Woo-Young Woo-Young Ahn, Richard J. Bonnie, Morris B. Hoffman, Owen D. Jones, Stephen J. Morse, Gideon Yaffe, Terry Lohrenz, Read Montague

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Criminal convictions require proof that a prohibited act was performed in a statutorily specified mental state. Different legal consequences, including greater punishments, are mandated for those who act in a state of knowledge, compared with a state of recklessness. Existing research, however, suggests people have trouble classifying defendants as knowing, rather than reckless, even when instructed on the relevant legal criteria.

We used a machine-learning technique on brain imaging data to predict, with high accuracy, which mental state our participants were in. This predictive ability depended on both the magnitude of the risks and the amount of information about those …


Abolition Of The Insanity Defense Violates Due Process, Stephen J. Morse, Richard J. Bonnie Jan 2013

Abolition Of The Insanity Defense Violates Due Process, Stephen J. Morse, Richard J. Bonnie

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This article, which is based on and expands on an amicus brief the authors submitted to the United States Supreme Court, first provides the moral argument in favor of the insanity defense. It considers and rejects the most important moral counterargument and suggests that jurisdictions have considerable leeway in deciding what test best meets their legal and moral policies. The article then discusses why the two primary alternatives to the insanity defense, the negation of mens rea and considering mental disorder at sentencing, are insufficient to achieve the goal of responding justly to severely mentally disordered offenders. The last section …


Mental Disorder And Criminal Law, Stephen J. Morse Apr 2011

Mental Disorder And Criminal Law, Stephen J. Morse

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Mental disorder among criminal defendants affects every stage of the criminal justice process, from investigational issues to competence to be executed. As in all other areas of mental health law, at least some people with mental disorders, are treated specially. The underlying thesis of this Article is that people with mental disorder should, as far as is practicable and consistent with justice, be treated just like everyone else. In some areas, the law is relatively sensible and just. In others, too often the opposite is true and the laws sweep too broadly. I believe, however, that special rules to deal …


Gene-Environment Interactions, Criminal Responsibility, And Sentencing, Stephen J. Morse Jan 2011

Gene-Environment Interactions, Criminal Responsibility, And Sentencing, Stephen J. Morse

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This chapter in, Gene-Environment Interactions in Developmental Psychopathology (K. Dodge & M. Rutter, eds. 2011), considers the relevance of GxE to criminal responsibility and sentencing. It begins with a number of preliminary assumptions that will inform the analysis. It then turns to the law’s view of the person, including the law’s implicit psychology, and the criteria for criminal responsibility. A few false starts or distractions about responsibility are disposed of briefly. With this necessary background in place, the chapter then turns specifically to the relation between GxE and criminal responsibility. It suggests that GxE causes of criminal behavior have no …


Lost In Translation?: An Essay On Law And Neuroscience, Stephen J. Morse Jan 2010

Lost In Translation?: An Essay On Law And Neuroscience, Stephen J. Morse

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The rapid expansion in neuroscientific research fuelled by the advent of functional magnetic resonance imaging [fMRI] has been accompanied by popular and scholarly commentary suggesting that neuroscience may substantially alter, and perhaps will even revolutionize, both law and morality. This essay, a contribution to, Law and Neuroscience (M. Freeman, Ed. 2011), will attempt to put such claims in perspective and to consider how properly to think about the relation between law and neuroscience. The overarching thesis is that neuroscience may indeed make some contributions to legal doctrine, practice and theory, but such contributions will be few and modest for the …


The Uneasy Entente Between Legal Insanity And Mens Rea: Beyond Clark V. Arizona, Stephen J. Morse, Morris B. Hoffman Jan 2007

The Uneasy Entente Between Legal Insanity And Mens Rea: Beyond Clark V. Arizona, Stephen J. Morse, Morris B. Hoffman

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There is uneasy tension in the criminal law between the doctrines of mens rea and the defense of legal insanity. Last term, the Supreme Court addressed both these issues, but failed to clarify the relation between them. Using a wide range of interdisciplinary materials, this article discusses the broad doctrinal, theoretical, and normative issues concerning responsibility that arise in this context. We clarify the meaning of mental disorder, mens rea and legal insanity, the justification for and the relation between the latter two, and the relation among all three. Next we consider the reasoning in Clark, and for the most …