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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 …