Can someone's personality be influenced by blood type? Ketsueki-gata is similar to how astrology is used to predict ...

one Japanese study published in PLOS ONE found that some personality traits differed between blood groups. People with type A, for instance, scored higher on persistence compared to types B or O.

Blood Group Personality Theory is a superstitious belief ... According to this theory, people with blood type O are more confident and aggressive than others. Surprisingly, this description ...