International reference atlas
Signature slant alone cannot identify the writing hand.
Handwriting and graphology
Researchers have studied group differences in the strokes of selected Latin letters. A group finding for a particular letter is not a rule for deciding which hand one person used in another script.
Suppose a Hebrew signature leans left. Describe the slant and compare signatures of known origin without assuming that a left hand, or a particular person, produced it.
Graphology associates handwriting with personality. Each proposed link needs an independent test of its predictive value.
Handwriting and graphologyA person may form one letter several ways even within one sentence. Comparison needs a range of examples rather than the nearest match.
Handwriting and graphologyExaminers consider how a stroke travels, breaks and changes along its path. With a photograph the first question is which details the image actually retains.
Graphologist Israel