Graphology is the study of handwriting, especially when employed as a means of analyzing character. Real handwriting experts are known as forensic document examiners, not as graphologists. Forensic (or questioned) document examiners consider loops, dotted "i's" and crossed "t's," letter spacing, slants, heights, ending strokes, etc. They examine handwriting to detect authenticity or forgery.

Graphologists examine loops, dotted "i's" and crossed "t's," letter spacing, slants, heights, ending strokes, etc., but they believe that such handwriting minutiae are physical manifestations of  unconscious mental functions. Graphologists believe such details can reveal as much about a person as astrology , palm reading,  psychometry, or the Myers-Briggs personality type indicator. However, there is no evidence that the unconscious mind is a reservoir of truth about a person, much less that graphology provides a gateway to that reservoir.

Graphology is claimed to be useful for everything from understanding health issues, morality and past experiences to hidden talents and mental problems.* However, "in properly controlled, blind studies, where the handwriting samples contain no content that could provide non-graphological information upon which to base a prediction (e.g., a piece copied from a magazine), graphologists do no better than chance at predicting... personality traits...." ["The Use of Graphology as a Tool for Employee Hiring and Evaluation," from the British Columbia Civil Liberties Association] And even non-experts are able to correctly identify the gender of a writer about 70% of the time (Furnham, 204).

There are a variety of techniques used by graphologists.* Even so, the techniques of these "experts" seem to be reducible to impressions from such things as the pressure exerted on the page, spacing of words and letters, crossed t's, dotted i's, size, slant, speed and consistency of writing. Though graphologists deny it, the content of the writing is one of the more important factors in graphological character assessment. The content of a message, of course, is independent of the handwriting and should be irrelevant to the assessment.

Barry Beyerstein (1996) considers many of the notions of graphologists to be little more than sympathetic magic, e.g., the notion that leaving wide spaces between letters indicates a proneness to isolation and loneliness because the wide spaces indicate someone who does not mix easily and is uncomfortable with closeness. One graphologist claims that a person betrays his sadistic nature if he crosses his t's with lines that look like whips.

Since there is no useful theory as to how graphology might work, it is not surprising that there is no empirical evidence that any graphological characteristics significantly correlate with any interesting personality trait.