The Dynamic Character of Disguise Behavior for Text-based, Mixed, and Stylized Signatures
Article first published online: 15 OCT 2010
© 2010 American Academy of Forensic Sciences
Journal of Forensic Sciences
Volume 56, Issue Supplement s1, pages S136–S141, January 2011
How to Cite
Mohammed, L. A., Found, B., Caligiuri, M. and Rogers, D. (2011), The Dynamic Character of Disguise Behavior for Text-based, Mixed, and Stylized Signatures. Journal of Forensic Sciences, 56: S136–S141. doi: 10.1111/j.1556-4029.2010.01584.x
- Issue published online: 3 JAN 2011
- Article first published online: 15 OCT 2010
- Received 17 Aug. 2009; and in revised form 16 Dec. 2009; accepted 20 Dec. 2009.
- forensic science;
- document examination;
- signature examination;
- signature style;
- dynamic parameters;
Abstract: The aims of this study were to determine if dynamic parameters (duration, size, velocity, jerk, and pen pressure) differed for signing style (text-based, stylized, and mixed) and if signing style influences handwriting dynamics equally across three signature conditions (genuine, disguised, and auto-simulation). Ninety writers provided 10 genuine signatures, five disguised signatures, and five auto-simulated signatures. All 1800 signatures were collected using a digitizing tablet resulting in a database of each signature’s dynamic characteristics. With genuine signatures, there were significant differences between styles for size, velocity, and pen pressure, and there were significant differences between genuine signatures and at least one of the un-natural signature conditions for all parameters. For velocity and size, these changes with condition were dependent on style. Changes with condition for the other parameters were similar for the three styles. This study shows that there are differences among natural signature styles and disguise behaviors that may be relevant in forensic signature examinations.