Statistics, Center for Statistics and Applications in Forensic Evidence (CSAFE)"
American Association of Forensic Sciences (AAFS)
This study aims to provide statistical support for the relationship between demographic variables and the slant in a person's handwriting. Data of handwriting samples were collected and then broken into smaller segments of writing that we call ''graphs'' by the handwriter R package. They were then grouped into 40 clusters of similar graphs. For each graph, a quantitative measure of slant called the rotation angle is computed. An example graph with possible rotation angles is shown below. We then fit a regression with the demographic information as explanatory variables and the rotation angles as the response. As rotation angles live on a circle, the regression model is based on the projected normal probability model, appropriate for this type of circular data.
Ray, Anyesha and Carriquiry, Alicia L., "Relationships between Handwriting Slant and Demographic Feature" (2021). CSAFE Presentations and Proceedings. 79.