Effects of Writing Speed Upon Modes of Signature Simulation: A Kinetic Analysis

  • James G. Phillips Monash University, Australia
  • Soula Noutsis Monash University, Australia
  • Chris Hughes Monash University, Australia
  • Doug Rogers Victoria Forensic Sciences Center, Victoria, Australia
Keywords: freehand signature simulation, tracing, pen pressure, motor program

Abstract

To better distinguish between traced and freehand signature simulations, 12 participants practiced upon a WACOM SD420 graphics tablet tracing a historical signature at Slow or Very Slow speeds, with a subsequent comparison of freehand and traced signature simulations. Kinematic analyses focused upon stroke efficiency and pressure, while computer algorithms determined variability of simulations around an original. Traced simulations had reduced spatial variability after practice. Very Slow simulations were more dysfluent, had greater spatial error and employed more pressure. Pen pressures varied more with speed during freehand reproductions. Writing speed was an important contributor to line quality and spatial correspondence during signature simulation.

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Published
2018-12-31
How to Cite
Phillips, J., Noutsis, S., Hughes, C., & Rogers, D. (2018). Effects of Writing Speed Upon Modes of Signature Simulation: A Kinetic Analysis. Journal of Forensic Document Examination, 28, 57-64. https://doi.org/10.31974/jfde28-57-64
Section
Research Papers - Handwriting Research