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ABO Blood Type and Personality Traits: Evidence from Large-scale Surveys in Japan

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posted on 03.06.2020 by Masayuki Kanazawa

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.


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Declaration of conflicts of interest

No potential conflicts

Corresponding author email

mkana@kfx.biglobe.ne.jp

Lead author country

Japan

Lead author institution

Human Science ABO Center

Human Participants

Yes

Ethics statement

The data used in this study (Appendix A and Supplementary Material File) was collected by the means of crowdsourcing. With the intention of avoiding ethical issues, question items on blood type characteristics of this study were extracted from reviewed academic articles (Sato et al. 1992; Watanabe 1994). These items were checked again at the previously stated crowdsourcing company which has been passed the Japanese privacy mark (JIS Q 15001). The company confirmed that there was no problem with the question items. It provides customers with anonymized data and obtains informed consent from participants (respondents) prior to its surveys.

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