Spiral tracing on a touchscreen is influenced by age, hand, implement, and friction

• Brittany D. Heintz,

  Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Project administration, Software, Visualization, Writing – original draft, Writing – review & editing

  Affiliations Department of Kinesiology, University of Wisconsin–Milwaukee, Milwaukee, WI, United States of America, Center for Aging and Translational Research, University of Wisconsin–Milwaukee, Milwaukee, WI, United States of America

  http://orcid.org/0000-0002-5418-7072

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• Kevin G. Keenan

  Roles Conceptualization, Formal analysis, Funding acquisition, Methodology, Project administration, Resources, Software, Supervision, Validation, Writing – review & editing

  * E-mail: keenan@uwm.edu.

  Affiliations Department of Kinesiology, University of Wisconsin–Milwaukee, Milwaukee, WI, United States of America, Center for Aging and Translational Research, University of Wisconsin–Milwaukee, Milwaukee, WI, United States of America

  http://orcid.org/0000-0001-5419-6430

  ⨯