The  purposes  of  this  research  were  to find 

1)  the level  of instructional supervision  performance  in  the schools
of  Bangkok  Archdiocese ,   

2)  the  level  of  learner  center  approach  of  instruction  in  the  schools  
of  Bangkok  Archdiocese  and 

3)  the instructional   supervision  performance  affecting  learner center 
approach  in  the  schools  of  Bangkok  Archdiocese.
The  samples  were  32  schools   of   Bangkok  Archdiocese.  
The respondents   were  administrators, 
Academic  assistant administrators, heads  of  experience  groups, and  
teachers.  The  data  were  collected  from  October  to  November  2002.
The   research  instruments were questionnaires on  instructional  supervision
performance  in  regard  to  the  view-points  of  Glickman and others, and 
the learner center approach  according to the indicators  of  the instructional  
efficiency  development  center, Office of  the  National Education
Commission.
                 
The  statistics  used   for  data  analysis  were  frequencies   (f),   percentage
(%),  means (X),  standard deviation  (S.D.),  and  stepwise  multiple  regression 
analysis  by  using  SPSS  (Statistic  Package  for  the  Social  Science)
                
The  findings  revealed  that  : The supervision performance in the schools
of Bangkok Archdiocese  as  a  whole  was  at  a high  level, the level of
learner center approach  of  instruction  in  the  schools  of Bangkok 
Archdiocese as  a  whole  was  at  a high ,  and  the instructional   supervision  
performance  affecting    learner center approach in the schools of  Bangkok 
Archdiocese was direct personal support and  professional  development.