Conclusion
We found a clear relationship between blood type and the self-reported
personality of many single question items, which matches traits
previously stated. The effect of blood type on personality was shown as
partial η2 = 0.053 at the maximum in this
study; the effect size small to medium. The same traits were observed in
the no-knowledge group, though the difference was smaller. AI predicted
the blood type of participants more accurately than chance. Our findings
provide a new, if hypothetical, framework of how genes affect human
personality.
Meanwhile, the sample in this study was limited to Japanese populations
only, the AI training data was small in sample size, and its use
experimental. Additional research using a larger, global dataset is
needed in order to address true implications, as well as to improve
algorithms and methodologies.