Chart 1. Survey 2
Score of Item h (Serious) by Gender and Age
The issue concerning the difference of human personality affected by
gender and age, have been explored in the fields of personality
psychology and social psychology. Although some people argue that
personalities are affected by gender and age, and the differences are
nonlinear (Soto, John, Gosling & Potter, 2011; Kawamoto et al., 2015),
others argue that they are not affected (Costa, Terracciano & McCrae,
2001). In any case, many researchers seem to agree upon the existence of
differences, at least self-reported. We also believe that there are such
differences.
Our study has several points to be improved. Firstly, the participants
in this study were limited to Japanese populations only. It is necessary
to examine whether the same results can be obtained in samples of other
countries. Secondly, we used the 2,000-population AI training data, but
this is a relatively small sample size; 10,000 or more persons are
desirable. Lastly, researchers have not yet found an appropriate method
to utilize AI for personality psychology. In this pilot study, we
adopted a facial recognition method (Nakamura & Iwasada, 2017), but
better algorithms should be considered.