Helene Rutledge, a healthcare executive and entrepreneur, has one type A friend (she counts herself as one too), one hybrid and another who is a “massive type B”. That friend is the kind you might ...

There are many theories about what determines someone’s personality. The majority of personality theories related to outside forces—such as zodiac signs and blood type—have largely been debunked as ...

Before the Myers-Briggs Type Indicator (MBTI) became a hot topic, South Koreans relied on blood types (A, B, AB and O) as a way to identify personality traits. This blood type personality theory ...