fMRI as a detector of deception

• advantages of fMRI over the poligraph
• feasibility of discrimination between lie and truth
• utilisation of fMRI for lie detection

Untitled Slide

A STUDY OF DECEPTION BY G.GAINS,R.MORRIS & S.KOSSLYN(2008),USED INDIVIDUAL DIFFERENCES APPROACH.
THE FMRI DATA REVEALED THAT THE BRAIN REGIONS ENGAGED IN THE PRODUCTION OF SELF-RELATED LIES WERE DISTINCT FROM THE REGIONS SUPPORTING THE PRODUCTION OF OTHER-RELATED LIES.FINDINGS SUGGESTED A CONSIDERATION OF INDIVIDUAL DIFFERENCES IN NEUROIMAGING STUDIES OF DECEPTION.

IN 2005 D.DLANGLEBEN,J.LONGHEAD,W.B.BILKER,K.RUPAREL,A.R. CHILDRESS,S.I.BUSCH & R.GUR USED A CHOICE FORCE MODEL TO TEST THE FEASIBILITY OF FMRI IN LIE DETECTION.
RESULTS INDICATED A HIGH ACCURACY IN THE CLASSIFICATION OF LIE AND TRUTH EVENTS,SUGGESTING A CONFIRMATION FOR THE FEASIBILITY OF A PRACTICAL FMRI BASED LIE-DETECTION SYSTEM.

Criticism of fMRI-based lie detection

• reproducibility issue
• variability of accuracy(between 76 and over 90%)
• human rights and ethical issues
• legitimacy of using of fMRI for non-medical purpose
• i.e,using fMRI lie detection evidence may influence the jurors ' decision in a criminal trial.(McCabe,2011)

IN 2005 D.DLANGLEBEN,J.LONGHEAD,W.B.BILKER,K.RUPAREL,A.R. CHILDRESS,S.I.BUSCH & R.GUR USED A CHOICE FORCE MODEL TO TEST THE FEASIBILITY OF FMRI IN LIE DECTION