APS

2026 APS Annual Convention · 2026

Determining the Smallest Effect Size of Interest: Identifying Necessary Information and Developing Practical Methods for Psychological Research

Barcelona, Spain · May 2026

Posters · How We Know: Methods, Measurement & Open Science

  • Paul Riesthuis
    KU Leuven
  • Henry Otgaar
    Maastricht University
  • Charlotte Buecken
    Kuleuven University, Leuven
  • Daniel Lakens
    Eindhoven University of Technology
  • Celio Victoria
  • Sajedeh Rasti
  • Robert Cribbie

Abstract

We examined what information researchers need to determine the smallest effect size of interest (SESOI) and tested a practical SESOI-setting procedure. In a study with memory researchers (N = 57), most could determine a SESOI using the provided materials. We propose a generalizable, consensus-based framework to support SESOI determination.

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