Influence of Writing Posture on the Dimensions of Signatures

In order to study the influence of writing posture on the dimensions of signatures, the authors asked 21 volunteers to sign their names in 4 different writing positions. Such items as receipts, checks, or short notes are sometimes written or signed in unusual writing positions, which some claim may influence the dimensions or proportions of the writing. The measured parameters (length, height, proportions) that are modified when writing under unusual conditions, as well as the range of these modifications, proved to be variable from 1 writer to another. While the average variation for the writers in this study was low, great variations were observed in some cases. Furthermore, no correlation could be established between the kind of variation observed and the graphical appearance of the signatures.