B1 Other refereed article (e.g., editorial, letter, comment) in a scientific journal
Beyond group averages: why motor control studies must address population and individual heterogeneity; 
Authors: Rudroff, Thorsten
Publisher: American Physiological Society
Publication year: 2026
Journal: Journal of Neurophysiology
Volume: 135
Issue: 6
First page : 1451
Last page: 1452
ISSN: 0022-3077
eISSN: 1522-1598
DOI: https://doi.org/10.1152/jn.00021.2026
Publication's open availability at the time of reporting: Open Access
Publication channel's open availability : Open Access publication channel
Web address : https://doi.org/10.1152/jn.00021.2026
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/526534601
Self-archived copy's licence: CC BY
Self-archived copy's version: Publisher`s PDF
TO THE EDITOR: Kim et al. (1) make an important conceptual contribution by distinguishing force variability from force smoothness during isometric contractions, demonstrating that these metrics respond differently to visual gain manipulation. However, the study suffers from two fundamental problems that undermine its scientific validity: 1) a demographically opaque convenience sample of 14 participants presented as revealing universal principles of human motor control, and 2) visible individual heterogeneity in the data that is completely ignored in favor of group averages. These issues exemplify what I term the “dual diversity crisis” in neuroscience research—the simultaneous neglect of both population diversity and brain diversity.
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