Using pretest data to screen low-reactivity individuals in the autonomic-based concealed information test

Area of Science:

• Forensic Psychology
• Psychological Assessment
• Deception Detection

Background:

• The concealed information test (CIT) is a tool used to determine if an individual possesses specific knowledge about a crime.
• Current CIT methods have limitations in their ability to accurately discriminate between guilty and innocent individuals.
• Improving the diagnostic performance of the CIT is crucial for its effective application in legal and investigative contexts.

Purpose of the Study:

• To investigate whether pretest screening enhances the diagnostic accuracy of a mock-crime concealed information test (CIT).
• To assess the impact of screening out participants with non-distinctive responses on pretest measures.
• To evaluate the trade-offs associated with pretest screening in CIT application.

Main Methods:

• A mock-crime scenario was used to administer the CIT.
• A pretest was conducted on 152 participants (80 assigned as guilty) to identify distinctive response patterns.
• Participants were screened based on their pretest responses before the main CIT was administered.

Main Results:

• Pretest screening significantly improved the diagnostic value of the mock-crime CIT.
• A substantial proportion of participants (33.6%) remained undiagnosed after the screening process.
• The screening procedure demonstrated potential but highlighted the need for improved methods to categorize participants.

Conclusions:

• Pretest screening is a promising strategy for enhancing the diagnosticity of the concealed information test (CIT).
• The current pretest screening approach leads to a notable rate of undiagnosed participants, indicating a need for refinement.
• Further development of dedicated screening measures is recommended to optimize the application of pretest screening in CIT protocols.