Position Type
- Present
She / Her / Hers
B.S., M.S.Ed. Southern Illinois University, Ph.D. Purdue University

Learning & Teaching

  • HESS 201: Fundamentals of Health and Exercise
  • HESS 203: Research Methods
  • HESS 304: Kinesiology
  • HESS 350: Practicum (Senior Year Experience)
  • HESS 405: Health Behavioral Theory
  • HESS 426: Motor Learning and Control
Academic Positions
  • Assistant Professor, Denison University, 2021 – Present
  • Assistant Professor, Ohio Dominican University, 2020 – 2021
  • Postdoctoral Researcher, University of California Riverside, 2019 – 2020



My research focuses on understanding: (1) how environmental factors and task constraints affect infants’ ability to adapt and maintain postural control while beginning to sit, stand, and walk, and (2) how these postural control adaptations impact other areas of development in neurotypical infants and infants at risk for and diagnosed with developmental disorders.


  • Arnold, A. J., Haworth, J. L., Moran, V. O., Abulhasan, A., Steinbuch, N., & Kokkoni, E. (2020). Exploring the unmet need for technology to promote motor ability in children under 5 years of age: a systematic review. Archives of Rehabilitation Research and Clinical Translation, 2(2), 1-12. DOI: 10.1016/j.arrct.2020.100051
  • Chagdes, J. R., Liddy, J. J., Arnold, A. J., Claxton, L. J., & Haddad, J. M. (2020). A mathematical model to examine issues associated with using portable force-measurement technologies to collect infant postural data. Journal of Motor Learning and Development, 8(1), 14-37. DOI: 10.1123/jmld.2019.0009
  • Arnold, A. J., Liddy, J. J., Harris, R. C., & Claxton, L. J. (2020). Task-specific adaptations of postural sway in infant sitting. Developmental Psychobiology, 62, 62-99. DOI: 10.1002/dev.21910
  • Liddy, J. J., Arnold. A. J., Cho, H., Romine, N. L., Haddad, J. M. (2019). The effect of holding an object on postural stability and suprapostural task performance. Journal of Applied Biomechanics, 35(6), 418-425. DOI: 10.1123/jab.2019-0040
  • Arnold, A. J., & Claxton, L. J. (2017). To drop or not to drop: Newly standing infants maintain hold of objects when experiencing a loss of balance. Journal of Motor Learning and Development, 5(2), 181-192. DOI: 10.1123/jmld.2016-0052


Professional Memberships
  • North American Society for the Psychology of Sport and Physical Activity
  • International Motor Development Research Consortium
  • International Congress of Infant Studies
  • Society for Transparency, Openness, and Replication in Kinesiology


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