Note. The higher the level, the more informed.
Regardless of whether a person had knowledge of the characteristics of
his/her blood type, the scores of characteristics for items that fit
his/her blood type were higher than those of the other blood types. In
both studies, the scores of characteristics which “did not fit” to
one’s blood type in the “I know well” or “I know some” group were
higher than those of characteristics “fit” to one’s blood type in the
“I don’t know at all” (no-knowledge) group. In the no-knowledge group,
scores of 4 out of 8 items were reversed in Survey 1, and 2 items out of
all 12 were so in Survey 2. Thus, these items of Survey 2 were
statistically significant in the binomial distribution at p =
0.019.
Analysis 3: Cross-tabulation of
Knowledge, Extroversion and
Sociability
According to the results obtained by a Japanese psychologist (Yamaoka,
2009), groups with more knowledge of blood type tended to be more
interested in personality and other people. To confirm this, we
investigated correlations by adding 3 items (Q1-m, n and o) in Survey 2.
All 3 items were significant at p < 0.001 like Analysis
2; those with more knowledge were more likely to be extravert and
sociable (Table 5).