The Verifiability Approach: a meta-analysis

Nicola Palena, Letizia Caso, Aldert Vrij, Galit Nahari

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The Verifiability Approach (VA) is a verbal veracity tool that assumes that truth tellers provide more details that can be verified and obtain a higher ratio of such details (verifiable details/total details) than liars. A VA meta-analysis was conducted. Results showed that truth tellers reported more Verifiable Details than liars (k = 20, N = 1532, g = 0.42). The effect was moderated by the presence of the Information Protocol and by the nature of the statement (event-related or not). Truth tellers reported a higher ratio of Verifiable Details than liars (k = 18, N = 1359, g = 0.49). The effect was moderated by the medium through which the statement was provided. Unverifiable details did not discriminate truth tellers from liars (k = 15, N = 957, g = -0.25). In conclusion, results showed good potential for the use the VA, although replications and field studies are needed.
Original languageEnglish
JournalJournal of Applied Research in Memory and Cognition
Early online date19 Nov 2020
Publication statusEarly online - 19 Nov 2020


  • verifiability approach
  • verifiable detail
  • checkable details
  • meta-analysis


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