It said that there was no difference according to ABO blood group in personality test (Big Five).
Subjects were 502 soldiers in the Czech Republic.
This result (no difference) is as expected, but there was a difference in RH blood type somehow ...
Anyway, we can read the paper free of charge.
Jaroslav Flegr et al., (2013), Toxoplasmosis-Associated Difference in Intelligence and Personality in Men Depends on Their Rhesus Blood Group but Not ABO Blood Group
PLoS One. 2013; 8(4): e61272.
Published online 2013 Apr 10. doi: 10.1371/journal.pone.0061272
- Here, we searched for differences in the toxoplasmosis-associated effects between RhD-positive and RhD-negative subjects by testing 502 soldiers with two personality tests and two intelligence tests. The infected subjects expressed lower levels of all potentially pathognomic factors measured with the N-70 questionnaire and in neurasthenia measured with NEO-PI-R.
- The analyses showed significant effect of RhD phenotype-toxoplasmosis interaction on psychasteny and IQ and no significant effects of ABO phenotype or ABO phenotype interaction (Tab. 3).