The traces left on the writing carrier-handwriting by people using writing tools reflect the writer's special writing habits and accumulate rich personal information of the writer. This is because everyone grew up in different environments, experiences, physical qualities, temperament, hobbies and other aspects, forming their own unique handwriting. And once formed, it will remain stable for a certain period of time and will not undergo fundamental changes.
Judging who wrote some words according to the characteristics of handwriting is called handwriting identification; Understanding the writer's personality characteristics and writing physiological and psychological state through handwriting is called handwriting psychological analysis. Since ancient times, China has said that "heart and hand are connected", "words are like people" and "people are not as good as words". Keep your word, keep your word. Handwriting is handwriting, but also a kind of heart trace and an expression of heart. Among the research methods of psychology, there are so-called projection method and job analysis method. By drawing trees, houses and animals, subjects can know their intelligence level and personality characteristics, and handwriting analysis has the same effect. In some cases, handwriting analysis is more reliable than personality questionnaire.