Greely-Illes Critique (2007)
Definition
Henry Greely and Judy Illes's 2007 analysis in the American Journal of Law and Medicine identifying five categories of problem with fMRI lie-detection claims: validity, individualisation, ecological validity, countermeasures, and normative population concerns.
- Authors
- Henry Greely and Judy Illes
- Year
- 2007
- Publication
- American Journal of Law and Medicine
- Categories raised
- Validity, individualisation, ecological validity, countermeasures, population concerns
Common questions
What is the difference between the validity and ecological validity concerns in the critique?+
Validity asks whether fMRI reliably distinguishes truth from deception at all under laboratory conditions, while ecological validity asks whether findings from artificial lab tasks, such as instructed lying about playing cards, actually generalise to the high-stakes, spontaneous deception at issue in a real investigation or courtroom.
Why does the countermeasures concern matter for admissibility?+
If a subject can defeat the scan through mental strategies such as covert movement or counting, without detection by the examiner, then a passing result cannot be trusted as proof of truthfulness, which undermines the technique's reliability as evidence regardless of how well it performs on a cooperative subject.
Related terms
- AI Act Article 5(1)(F)
- The EU AI Act prohibition on AI systems that infer emotions, intentions, or characteristics from biometric data in law-enforcement and related contexts....
- BEOS / Brain Fingerprinting
- Lawrence Farwell's EEG-based method using the P300 event-related potential to detect concealed knowledge of crime-relevant items. Addressed by the Indian Supreme Court...
- BOLD Signal
- Blood-oxygen-level-dependent signal; the measure in fMRI that captures changes in the ratio of oxyhaemoglobin to deoxyhaemoglobin as a proxy for neural activity....
- Cephos Corporation
- A US company that offered commercial fMRI lie-detection services from approximately 2006. Its technique was excluded from evidence in US v. Semrau...
- Daubert Standard
- The US federal evidentiary standard (Daubert v. Merrell Dow Pharmaceuticals, 1993) requiring that expert testimony be based on scientifically valid methods with...
- Ecological Validity
- The degree to which a measurement or test procedure produces results that generalise from the controlled laboratory context to the real-world condition...
- No Lie MRI
- A San Diego-based company offering fMRI lie-detection services during the same period as Cephos. No court has admitted No Lie MRI evidence...
- P300 ERP
- A positive-going scalp electrical potential peaking approximately 300 ms after presentation of a significant, infrequent, or unexpected stimulus. Used in EEG-based concealed-information...
- US V. Semrau (2010/2012)
- The US district court Daubert hearing (2010) and Sixth Circuit affirmance (2012) excluding Cephos fMRI lie-detection evidence on grounds of insufficient testability,...