The purpose of this study is to analyze the characters of clinical supervision, depending on a level
of mentor efficacy of supervisors through practical case studies. Two groups, namely, H-group and
L-group, were defined for the case studies in terms of the level of supervisors’ mentor efficacy. 5
supervisors each from H-group and L-group were selected as the objects of the case studies. The
selected supervisors performed clinical supervision for 17 weeks with kindergarten teachers. For the
case studies, contents analysis was conducted, using voice recordings and documents collection from
the selected supervisors during the supervising procedure. The results of this study are as follows: In
a view point of supervisors’ role, supervisors show that they carry out roles of both teacher and
learner during clinical supervision regardless of a level of mentor efficacy. Nevertheless, there is
variation in the detailed role. In a view point of aspect of clinical supervision, supervisors, with a
high mentor efficacy level, show that they conduct collaborative supervision and utilize various
methods to expand and change teachers’ thought and contents for teaching-learning improvement.
On the contrary, supervisors, with a low mentor efficacy level, show that they are accustomed to
conduct directive and informational supervision. They provide contents to lead an easy approach to
supervision. Their methods specify detailed activities and materials that can be immediately utilized
in class. In a view point of appreciation of clinical supervision as perceived by teachers, teachers,
under supervisors with a high mentor efficacy level, show they make collaborative relationship with
their supervisors and focus on advancing their own education to be a good teacher. On the contrary,
teachers, under supervisors with a low mentor efficacy level, show they prefer making a one-way and
dependent relation. They do not want to receive intensive education.