Law Commons^™

Neuroscience And Mental Competency: Current Uses And Future Potential, John B. Meixner Jr.

Scholarly Works

One major conundrum in the field of law and neuroscience is that the mental states that are most relevant to legal determinations are often mental states that occurred in the past, and can longer be assessed. Could the defendant, at the time he committed the crime, have had the cognitive capacity to satisfy the required mens rea for the crime charged? Was an individual's tortious conduct intentional or inadvertent? Even if the field of neuroscience eventually gains the ability to provide data relevant to understanding of immediate mental states, those data will be unavailable to legal actors by the time …

Admissibility And Constitutional Issues Of The Concealed Information Test In American Courts: An Update, John B. Meixner Jr.

Scholarly Works

The use of physiological tools to detect incidentally acquired concealed knowledge about crime-related information has been a controversial and well-researched topic among scholars for well over 100 years. This chapter focuses on potential legal hurdles for courtroom use of concealed information tests, including admissibility issues and constitutional issues under the Fourth and Fifth Amendments to the US Constitution.

Models Of Law, Christian Turner

Scholarly Works

The more we examine what is behind our most difficult legal questions, the more puzzling it can seem that we continue both to disagree strongly and, yet, to cooperate. If law is a reasoned enterprise, how is it that we are neither torn apart nor homogenized by our long social practice of it? I resolve this puzzle, and arrive at a richer understanding of law, using the idea of modeling familiar from the natural sciences and mathematics. I show (a) that theorists can model legal systems as abstract systems of institutions, information flows, and institutional processing or reasoning and (b) …

Lying In The Scanner: Covert Countermeasures Disrupt Deception Detection By Functional Magnetic Resonance Imaging, Giorgio Ganis, J. Peter Rosenfeld, John B. Meixner Jr., Rogier Kievit, Haline Schendan

Scholarly Works

Functional magnetic resonance imaging (fMRI) studies have documented differences between deceptive and honest responses. Capitalizing on this research, companies marketing fMRI-based lie detection services have been founded, generating methodological and ethical concerns in scientific and legal communities. Critically, no fMRI study has examined directly the effect of countermeasures, methods used by prevaricators to defeat deception detection procedures. An fMRI study was conducted to fill this research gap using a concealed information paradigm in which participants were trained to use countermeasures. Robust group fMRI differences between deceptive and honest responses were found without, but not with countermeasures. Furthermore, in single participants, …

Countermeasure Mechanisms In A P300-Based Concealed Information Test, John B. Meixner Jr., J. Peter Rosenfeld

Scholarly Works

The detection of deception has been the focus of much research in the past 20 years. Though much controversy has surrounded one deception detection protocol, the “Control Question Test” (NRC 2003, Ben-Shakhar 2002), an alternative test, the Guilty Knowledge Test (GKT), developed by Lykken (1959, 1960), is based on scientific principles and has been well-received in the scientific community. The GKT presents subjects with various stimuli, one of which is a guilty knowledge item (termed the probe, such as the gun used to commit a crime). The other stimuli in the test consist of control items that are of the …

The Effects Of Asymmetric Vs. Symmetric Probability Of Targets Following Probe And Irrelevant Stimuli In The Complex Trial Protocol For Detection Of Concealed Information With P300, J. Peter Rosenfeld, Monica Tang, John B. Meixner Jr., Michael Winograd, Elena Labkovsky

Scholarly Works

The complex trial protocol (CTP, [J.P. Rosenfeld, E. Labkovsky, M. Winograd, M.A. Lui, C. Vandenboom & E. Chedid (2008), The complex trial protocol (CTP): a new, countermeasure-resistant, accurate P300-based method for detection of concealed information. Psychophysiology, 45, 906–919.]) is a sensitive, new, countermeasure-resistant, P300-based concealed information protocol in which a first stimulus (Probe or Irrelevant) is followed after about 1.4–1.8 s by a Target or Non-Target second stimulus within one trial. It has been previously run with a potentially confounding asymmetric conditional probability of Targets following Probes vs. Irrelevants. This present study compared asymmetric vs. symmetric conditional probability groups and …

Assigned Versus Random Countermeasure-Like Responses In The P300-Based Complex Trial Protocol For Detection Of Deception: Task Demand Effects, John B. Meixner Jr., Alexander Haynes, Michael Winograd, Jordan Brown, J. Peter Rosenfeld

Scholarly Works

The Concealed Information Test (CIT) is a credibility assessment protocol of an entirely different nature than the traditional lie detector test. Instead of attempting to detect actual lying (the goal of the commonly used Control Question Test), the goal of the CIT is to determine whether an individual possesses knowledge of specific details of a crime or event. For example, if a murder was committed at 800 Church Avenue using a .38 caliber revolver, the CIT seeks to determine whether a suspect recognizes the address and type of weapon.

The CIT presents subjects with various stimuli, one of which is …

Mindlessness And Nondurable Precautions, Paul J. Heald

Scholarly Works

Assuming initially that negligence law does not make the distinction between durable and nondurable precautions, this Article will first explain in economic terms why the failure of courts to take into account the cost of remembering may nonetheless be efficient. A substantial body of research on the phenomenon of mindless decisionmaking ("scripting") suggests that most remembering is automatic--a nonconscious response to frequently encountered patterns of stimuli. Script theory suggests that once the behavioral script is in place, an automatic response operates at a very low cost. If so, the failure of courts to account for the cost of remembering would …