The Electrocortical Signature of Successful and Unsuccessful Deception in a Face-to-Face Social Interaction

Tobias A Wagner-Altendorf, Arie H. van der Lugt, Jane F Banfield, Carsten Meyer, Caterina Rohrbach, Marcus Heldmann, Thomas F Münte*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Web of Science)

Abstract

Deceptive behavior, and the evaluation of others' behavior as truthful or deceptive, are crucial aspects of human social interaction. We report a study investigating two participants in a social interaction, performing a deception task. The first participant, the "informant," made true or false autobiographical statements. The second participant, the "detective," then classified these statements as truth or lie. Behavioral data showed that detectives performed slightly above chance and were better at correctly identifying true as compared with deceptive statements. This presumably reflects the "truth bias": the finding that individuals are more likely to classify others' statements as truthful than as deceptive - even when informed that a lie is as likely to be told as the truth. Electroencephalography (EEG) was recorded from the informant. Event-related potential (ERP) analysis revealed a smaller contingent negative variation (CNV) preceding "convincing" statements (statements classified as true by the detective) compared to "unconvincing" statements (statements classified as lie by the detective) - irrespective of whether the statements were actually truthful or deceptive. This finding suggests a distinct electrocortical signature of "successful" compared to "unsuccessful" deceptive statements. One possible explanation is that the pronounced CNV indicates the individuals' higher "cognitive load" when processing unconvincing statements.

Original languageEnglish
Article number277
Number of pages8
JournalFrontiers in Human Neuroscience
Volume14
DOIs
Publication statusPublished - 17 Jul 2020

Keywords

  • deception
  • truth
  • lie
  • EEG
  • ERP
  • contingent negative variation
  • CONTINGENT NEGATIVE-VARIATION
  • BRAIN ACTIVITY
  • LIE DETECTION
  • POTENTIALS
  • ACCURACY
  • CNV

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