Laterality indices consensus initiative (LICI): a Delphi expert survey report on recommendations to record, assess, and report asymmetry in human behavioural and brain research

Guy Vingerhoets*, Helena Verhelst, Robin Gerrits, Nicholas Badcock, Dorothy V. M. Bishop, David Carey, Jason Flindall, Gina Grimshaw, Lauren Julius Harris, Markus Hausmann, Marco Hirnstein, Lutz Jäncke, Marc Joliot, Karsten Specht, René Westerhausen, LICI consortium

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Laterality indices (LIs) quantify the left-right asymmetry of brain and behavioural variables and provide a measure that is statistically convenient and seemingly easy to interpret. Substantial variability in how structural and functional asymmetries are recorded, calculated, and reported, however, suggest little agreement on the conditions required for its valid assessment. The present study aimed for consensus on general aspects in this context of laterality research, and more specifically within a particular method or technique (i.e., dichotic listening, visual half-field technique, performance asymmetries, preference bias reports, electrophysiological recording, functional MRI, structural MRI, and functional transcranial Doppler sonography). Experts in laterality research were invited to participate in an online Delphi survey to evaluate consensus and stimulate discussion. In Round 0, 106 experts generated 453 statements on what they considered good practice in their field of expertise. Statements were organised into a 295-statement survey that the experts then were asked, in Round 1, to independently assess for importance and support, which further reduced the survey to 241 statements that were presented again to the experts in Round 2. Based on the Round 2 input, we present a set of critically reviewed key recommendations to record, assess, and report laterality research for various methods.

Original languageEnglish
Pages (from-to)122-191
Number of pages70
JournalLaterality
Volume28
Issue number2-3
DOIs
Publication statusPublished - 2023

Keywords

  • Delphi survey
  • good practices
  • laterality index
  • recommendations

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