What is the ruling on personality analysis? And is it permissible to analyze my handwriting to know my personality?

Psychology and its uses for personality analysis and understanding its nature are permissible according to Sharia, as long as no external impediment arises. However, the results of this analysis cannot be used as a basis for a Sharia ruling, due to the possibility of error within them. This also applies to personality analysis through handwriting, writing, and drawing.