Variations in signature of a person in different body positions

There has recently been a lack of judicial confidence in the evidence provided by handwriting analysis which has highlighted the need for objective research to be conducted in this area. Typically a person bases his signatures on one template and although no two instances are exactly the same, they are meant to represent the same shape. Because signatures are at least meant to be unique, they can be used for personal identification. This is also how signatures are used in legal cases. The aim of the study was to examine various writing characteristics, whether a different body position influence the signature of the writer. To study the variation in signature at different body posture i.e. sitting, standing and mobile, 3 samples of signature were collected from 100 persons. It has been found that movement of hand shows highly significant difference in all three body positions thereby movements of hand do changes with as position changes and has been concluded that in most of the studied features movement of hand, pen pressure and size of signature show maximum variation with changes in positions.