Using IBM’s Watson for Personality Insights (a Tone Analyzer is also available), I entered samples of text from answers I have written and posted at Quora.com.
IBM describes this tool as a means to:
Gain insight into how and why people think, act, and feel the way they do. This service applies linguistic analytics and personality theory to infer attributes from a person’s unstructured text.
This was the result in a graphic of the Big 5 summary of my personality as interpreted by Watson via my writing
You are analytical and particular.
You are philosophical: you are open to and intrigued by new ideas and love to explore them. You are assertive: you tend to speak up and take charge of situations, and you are comfortable leading groups. And you are altruistic: you feel fulfilled when helping others, and will go out of your way to do so.
Your choices are driven by a desire for discovery.
You consider independence to guide a large part of what you do: you like to set your own goals to decide how to best achieve them. You are relatively unconcerned with taking pleasure in life: you prefer activities with a purpose greater than just personal enjoyment.
It also predicts that I am likely to enjoy rap music and it is unlikely that I enjoy country music. That’s kind of interesting.
Accurate? I don’t know if I can say with certainty. I can say the results were consistent for the most part with every analysis I ran (approximately 10-12 written articles).