Quantitative Evaluation of Writing Disorder : Spatiotemporal Analysis Using A Tablet Device

Abstract

  The present study proposed a quantitative way to assess writing action and writing disorder using a tablet device. The proposed method revealed that (a) inter-stroke time interval was longer in patients with writing disorder, (b) the number of local minima in the tangential velocity was larger in the patients regardless of their symptoms, (c) several patients had different relationships between inter-stroke time and distance from the control group, and (d) the relationship between inter-stroke time and distance in the control group was relatively stable. Based on these findings, the efficacy of the proposed method was discussed.