The purpose of this study was to examine the self-determination motivation, social support and
personality of preservice early childhood teachers, the correlation of the three variables and the influence of
self-determination motivation and social support on personality in an effort to determine which tactor would
have a positive impact on their personality. And it's also meant to suggest how to improve the influential
variable(s). The findings of the study were as follows: First, as for the awareness of the preservice early
childhood teachers on self-determination motivation, they regarded affirmation/integrated regulation as their
stronger self-determination motivation, and viewed intrinsic regulation as a weaker motivation. Concerning
awareness of social support, they found themselves to be given emotional support the most, and
instrumental support was considered to be the smallest. Regarding awareness of personality, they put higher
value on their own social relationships, positive self-concept and job performance, and placed lower value
on creativity and personality. Second, as to the correlation of self-determination motivation, social support
and personality, there was a significant positive correlation among the variables. Third, in relation to the
relative influence of self-determination motivation and social support on personality, the two factors seemed
to have been the variables to determination motivation seemed to have been more influential, followed by
social support