Delphi with feedback of rationales: how large can a Delphi group be such that participants are not overloaded, de-motivated, or disengaged?

Ian Belton, George Wright, Aileen Sissons, Fergus Bolger, Megan Crawford, Iain Hamlin, Courtney Taylor Browne Luka, Alexandrina Vasilichi

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, we investigate the effect of Delphi group size and opinion diversity on group members’ information load as well as on their overall experience of the Delphi process - in terms of task involvement (enjoyment and interest) and in terms of group sway (the influence and helpfulness of others’ rationales). For Delphi applications involving the exchange of rationales between participants, we found no evidence that group sizes of up to 19 participants cause information overload or de-motivation and disengagement of participants.
Original languageEnglish
JournalTechnological Forecasting and Social Change
Publication statusAccepted/In press - 17 May 2021

Keywords

  • Delphi
  • group size
  • Delphi process

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