Research Abstract No.60
  
                    This study aimed to investigate the relationships among psychological traits, social
environment and discipline behaviors of Prathomsuksa 6 and Mathayomsuksa 3 students in Bangkok.
The subjects consisted of 276 Prathomsuksa 6 students of 1995 academic year from Department of
Education, Bangkok Metropolitan schools and 264 Mathayomsuksa 3 students of 1995 academic year
from Department of General Education schools, Ministry of Education. Data were gathered by giving
twelve questionnaires and one test to each subject to investigate need for achievement, attitude towards
discipline behaviors, supporting from school, moral reasoning ability, belief in internal locus of control of
reinforcement, future orientation and self - control, child rearing practices and parental identity on
discipline behaviors, teacherís preaching and identity on discipline behaviors, actual discipline behaviors,
perception of school rule and value, empathy, mental health and intelligence. Data collected were
analyzed by Stepwise - multiple regression analysis and t - test. 

                    Major findings were as follows : 
                    1. Internal factors (performer ís psychological traits) and external factors (social
environment) could significantly predict discipline behaviors of the total subjects. The variance explained
was 39.27 % 
                    2. The best predictor of discipline behaviors which was in the first rank of all, groups,
except Mathayomsuksa 3 students, was future orientation and self - control. The others were attitude
towards discipline behaviors, perception of school rule and value, need for achievement, child rearing
practices and parental identity on discipline behaviors and teacherís material support, respectively. 
                    When predictability (R2) of these variables was considered it was found that the
predictability was more than 50 % in the subgroups classified according to bio - social characteristics as
follows : 
                    For Mathayomsuksa 3 male students, future orientation and self-control, perception of
school rule and value, teacherís preaching and identity on discipline behaviors and moral reasoning could
altogether predict discipline behaviors. The R2 was. 52, and standardized regression equation was 
                                                 
                          Y = .6554X2 + .2396X20 + .1718X10 + .1259X1
                                                 
                    For Mathayomsuksa 3 female students, attitude towards discipline behaviors, future
orientation and self - control, perception of school rule and value, child rearing practices and parental
identity on discipline behaviors could altogether predict discipline behaviors. The R2 was .50, and
standardized regression equation was 
  
                          Y = .6058X5 + .3659X2 + .1563X20 + .1583X9
  
                    For Mathayomsuksa 3 students with low educated parents, future orientation and self -
control, attitude towards discipline behaviors, child rearing practices and parental identity on discipline
behaviors, perception of school rule and value could altogether predict discipline behaviors. The R2 was
.56, and standardized regression equation was 
                                                 
                                  Y = .6558X2 + .3173X5 + .1711X9 + .1637X20 + .1724X19
  
                    For Mathayomsuksa 3 students with high educated parents, future orientation and self -
control, perception of school rule and value, and attitude towards discipline behaviors could altogether
predict discipline behaviors. The R2 was .53, and standardized regression equation was 

                                                                              Y = .5957X2 + .3637X20 + .2758X5 

                    It was found that some of the psychological traits and perception of social environment
could altogether significantly predict discipline behaviors of Mathayomsuksa 3 students, whereas the
predictive value of Prathomsuksa 6 students was not more than 48.70 %. 
                    3. Among students with different bio - social characteristics, it was found that discipline
behaviors of Prathomsuksa 6 students were higher than those of Mathayomsuksa 3 students and those of
female students in both grades were also higher than those of male students. 
  

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