According to Karla, our writing reveals information about our emotional foundation, communications, mental processing, and fear or defense mechanisms.
Letters with a circle in them, like o's or a's reveal communications. If the loops are open, the person is likely to be open and easily share personal information. If the loops are closed, the person is likely to communicate more easily about business than personal matters. Twisted circles may indicate deliberate deceit, and intrusions into the circles may indicate past abuse. For people with a violent streak, the brain will cause the pen to stop and the ink to blot. Looking at the e's in your writing will indicate your listening skills - narrow e's may indicate restricted hearing, while open e's may indicate you're a good listener.
Mental processing can be glanced from m's and n's. Rounded tops show slow, methodical, cumulative thinking. Pointed tops would indicate curious, investigative thinkers. Rounded bottoms of m-connections would indicate a comprehensive, intuitive thinker. In combination, this may mean that someone who writes closed a's and round m's is slower to speak and may be processing.
Punctuation, particularly the way you cross your t's also holds information. Crossing your t at about 3/4 height shows you set practical goals. If your cross is lower to the base, you may lack confidence. Crossing the t right at the top shows you're shooting for high goals and may actually be chronically disappointed. Someone who crosses their t above without a connection to the letter is likely an inventor or idealist (not in the temperament sense).
For example, someone with ISTJ preferences is generally described as objective, dependable, orderly, thorough, reliable, and realistic. This will likely be demonstrated in their writing by a steady baseline, regular size of writing, and measured consistency. Margins in their documents will be organized, and punctuation will be precise. Letters with an upper and lower loop, like the f will likely show even-sized loops.
The upper loop indicates mental processing, the lower zone indicates action. Since all Types have balanced functions in terms of judging-perceiving as well as introverted-extraverted, we might expect all Types to have equal loops. We haven't discussed it in the meeting, but one guess would be that dominant perceiving functions' upper loops would be more pronounced, and lower loops would be more pronounced for people with dominant judging functions.
When we sent out the invitations to this event, some people criticized the premise of graphology as unscientific and not trustworthy. Personally, I like to keep an open mind. Sure, evidence may be anecdotal and it may not fit for everybody. It certainly depends on where you learned to write, e.g. in Germany, our capital I's, all r's, and small f's are simply different. And let's not forget children now don't even really learn how to write cursive anymore. Does that mean their personalities will develop differently? I don't know. Limiting our understanding of ourselves to any one model is never going to give us a complete picture though. I like my input from various sources before I decide whether I believe it or how I'll continue to use it.
If you'd like to learn more, here's a more detailed article on Type and Graphology. I'll also post our chapter's findings for those who were at the meeting over the next few days.