Does Your Blood Type Affect Your Personality?

Tracy Smith, LPC, NCC, ACS
January 25, 2019

Personality is believed to be influenced by various factors, including genetic, environmental, situational, and cultural aspects.  A specific branch of psychology, personality psychology, is devoted to the study of personality, traits, and behaviors.  Personality psychology is rooted in science and utilizes theories to describe what makes a person distinctive. There are some other theories of personality, such as astrology and zodiac signs, that are representative of a pseudoscience.  Pseudoscience is theories and statements mistakenly claimed to be based on the scientific method.  Another personality theory under the pseudoscience realm asserts that personality can be predicted by a person’s blood type.

blood type

Blood type personality theory was developed in Japan and professes that blood types are critical markers of one’s personality.  There are four blood types, A, B, AB, and O, each defined by various personality traits.  Blood types are used to assess relationships, compatibility, and behaviors.  The majority of the Japanese population has type A blood and the rarest blood type in Japan is type AB.

In Japan, an individual may be questioned about their blood type, which is a straightforward query about personality, in the same way that a person may be questioned about their zodiac sign in the United States.  Some individuals in Japan use blood types as an indicator of relationship compatibility and will only date a well-matched blood type to their own.  Blood types are a popular topic in Japanese women’s publications and assess how well a potential or current partner matches up with the reader.  Additionally, blood type horoscopes are provided on a daily basis on Japanese television shows and newspapers.

People with blood type A are portrayed to be well-organized.  They exert timidity, anxiety, sensitivity, stubbornness, and can be easily stressed.  Individuals with an A blood type put great significance on maintaining harmony with others and are neat, attentive, reliable, and diligent.  The best traits in someone with type A blood is patience, responsibility, and sensibility, while the poorest traits are being obsessive, inconsiderate, and selfish.

Individuals with an O blood type are depicted as optimistic.  They are sociable, possess leadership abilities, and can set the tone in social groups.  They place little importance on small details and are flexible, resilient, and easily adaptable to all situations.  The best traits in an individual with type O blood is confidence, ambition, and determination, while their least positive traits include unpredictability, arrogance, and being aggressive.

Individuals with a B blood type are described as selfish and are recognized for their creativity.  They have a powerful sense of curiosity, but can be erratic and easily lose interest in activities.  They are unpredictable and adventurous, but can be indecisive and irresponsible.  Their best traits include passion, flexibility, and optimism, while their worst traits are selfishness, being lazy, and being unreliable.

People with an AB blood type are a mixture of blood types A and B and are viewed as complicated and eccentric.  They can possess two contradicting traits, such as being shy, while also being outgoing.  They are viewed as complicated, vulnerable, popular, and diplomatic.  Their best traits consist of creativity, calmness, and intelligence, while their poorest traits are being critical, showing indecision, and being aloof.

There have been numerous studies that have attempted to use research and statistics to study the linkage between blood type and personality.  Unfortunately, research has proven to be inadequate and restricted, as statistically inappropriate measures, methods, and samples have been utilized.  This has resulted in the failure to show any statistically significant correlations between blood type and personality. Due to this fact, blood type personality theory is largely dismissed by the scientific community.

Tracy Smith, LPC, NCC, ACS

Tracy is a Licensed Professional Counselor and is a clinical supervisor for the Community YMCA, Counseling & Social Services branch. Tracy has over 12 years of experience working in many settings including partial care hospitalization and intensive outpatient programs, community agencies, group practice, and school-based programs. Tracy works with clients of all ages, but especially enjoys working with the adolescents. Tracy  facilitates groups using art therapy, sand play and psychodrama.

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