Note. Standard deviations are in parentheses. Highest scores that match
with blood type characteristics, and p < 0.05 are
highlighted in bold. * p < 0.05 after the Bonferroni’s
correction.
On question item “Q2 Do you think blood type and personality are
related?”, 8.3% of the respondents answered “strongly related”,
40.6% answered “somewhat related”, 24.6% answered “a little
related”, 18.0% answered “not related at all” and 8.5% answered “I
don’t know”. On question item “Q3 Do you know the characteristics and
compatibility of blood types?”, 9.9% answered “I know well”, 54.6%
answered “I know some”, 23.5% answered “I know a little” and 12.0%
answered “I don’t know at all.”
In Survey 2’s ANOVA result (Table 7), 11 of the 12 items gave the
respondents’ image of blood type and were statistically significant, or
9 items after the Bonferroni’s correction. The magnitude of the
difference: η2 = 0.053 at the maximum and 0.019
at the average, thus, the effect sizes were intermediate between small
and medium. All of the responses were consistent with the most common
images of blood types that respondents expected, except “i Cheerful”,
which was to be type B in academic studies, but type A got the highest
score.
On question item “Q3 Do you think blood type and personality are
related?”, 6.1% of the respondents answered “strongly related”,
35.7% answered “somewhat related”, 28.0% answered “a little
related”, 20.1% answered “not related at all”, and 10.1% answered
“I don’t know”. On question item “Q4 Do you know the characteristics
and compatibility of blood types?”, 4.4% answered “I know well”,
41.4% answered “I know some”, 36.1% answered “I know a little”,
and 17.5% answered “I don’t know at all.”
Analysis 2: ANOVA of Blood Type and
Personality for “No-Knowledge
Group”
We used the 520 “no-knowledge” participants of Survey 2, who were free
of “self-fulfilling”, because they had no knowledge of blood type
personality or did not believe in the relationship. We did not use the
218 “no-knowledge” ones of Survey 1, because the sample size was too
small.