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Updated: Jun 9, 2025

Foreign Accent and Forensic Speaker Identification in Voice Lineups: The Influence of Acoustic Features Based on Prosody
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Illusory truth effect across languages and scripts.

Anna Hatzidaki1, Mikel Santesteban2, Eduardo Navarrete3

  • 1Department of English Language and Literature, National and Kapodistrian University of Athens, Athens, Greece.

Psychonomic Bulletin & Review
|October 28, 2024
PubMed
Summary
This summary is machine-generated.

The illusory truth effect, where repetition boosts statement credibility, persists across languages and scripts. This effect occurs regardless of whether information is repeated in the same or a different language, suggesting language is not critical.

Keywords:
BilingualismIllusory truth effectLanguage switchingProcessing fluencyRepetition

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Area of Science:

  • Cognitive Psychology
  • Bilingualism Studies
  • Social Psychology

Background:

  • The illusory truth effect demonstrates that repeated statements are perceived as more truthful.
  • Previous research has primarily focused on monolingual populations.
  • The influence of language and script on this effect in bilingual individuals remains underexplored.

Purpose of the Study:

  • To investigate whether the illusory truth effect is maintained across different languages and scripts in bilingual individuals.
  • To examine the role of processing fluency and conceptual representations in the illusory truth effect within a bilingual context.

Main Methods:

  • Two experiments were conducted with Italian-English and Greek-English bilingual participants.
  • Participants were exposed to unknown trivia statements in English and later rated their truthfulness.
  • Statements were repeated either in the same language (English) or a different language (Italian or Greek), with some conditions involving different scripts.

Main Results:

  • A significant illusory truth effect was observed: repeated statements were rated as more truthful than new statements.
  • Response times were faster for statements repeated in the same language, indicating increased processing fluency.
  • The magnitude of the illusory truth effect remained consistent regardless of whether repetition occurred in the same or a different language, even across different scripts.

Conclusions:

  • The illusory truth effect is robust and not critically dependent on the language or script of information presentation in bilinguals.
  • While repetition in the same language enhances processing speed, it does not alter the core truth-credibility effect.
  • The findings support the referential theory, suggesting the effect stems from conceptual fluency and overlapping representations in bilingual memory.