ABO Blood Type and Personality Traits: Evidence from Large-scale Surveys
in Japan
Abstract
The relationship between blood type and personality has long been one of
the more challenging issues of scientific studies. Several large-scale
surveys were conducted to address the issue, and some of them had shown
statistically significant associations. This study analyzed data from
two large-scale surveys (Survey 1: N = 1,000, Survey 2: N =
1,859) to examine the relationship between blood type and personality.
ANOVA results indicated that 17 of the total 20 respondents’ own
blood type characteristic question items scored higher as “fit to my
personality” than the averages of the other blood types. In both
Survey 1 and 2, the same differences in scores were found in the groups
who reported no blood type personality knowledge, although the values
were smaller. Thus, we observed a clear and significant
relationship between blood type and personality in large-scale surveys.