July 2 (UPI) -- Tattoos have become a form of self-expression, a means of telling the world something about yourself. Unfortunately, observers mostly misread these inky cues and misjudge the personalities of tattoo bearers, a new study says. Study participants tended to agree among themselves on what they think a tattoo says about someone, but their impressions were generally off-base, researchers report in the August issue of the Journal of Research in Personality . "When people saw a tattoo,