Genedy

Although graphology is not yet considered hard science, there are researchers who claim that there is a connection between the personality of a person and his or her handwriting. The idea is that each neurological brain characteristic generates a specific neuromuscular movement that is consistent for each person who has that personality. Think of graphology as a specific form of body language. In theory, highly successful persons have a specific style and pattern of writing, by imitating those patterns you could also change your personality to become like them.

This is a quote from http://www.myhandwriting.com FAQ 
“Q25: Can I really change my personality by changing my handwriting?
A: Grapho-Therapy is one of the most modern and effective behavioral modification tools available today. It works for two reasons. First, neuro-muscular connections have a direct impact on the neuro-pathways to the brain that hold patterns of behavior. Secondly, it gives the subject a clear and visual representation of the change she is making on a daily basis… reinforcing the belief system and cementing the change in behavior consciously and unconsciously.”