Abstract:
last - borns. The hypotheses were 1) there would be the difference in adjustment problems among first - horns, middle - borne and last barns 2) middle - barns would have the least problems of adjustment. The subjects were 40 first - borne, 40 middle - borns and 40 last - borne students. All students were chosen from family of three and five children and were fourteen to nineteen years old, from six schools in 5angkok metropolitan city. A Family Status Questionnaire and the Mooney Problem Check Lists were employed to the subjects, and the adjustments of subjects in all aspects as rated by teachers were obtained. One way analysis of variance and correlation coefficient were used to analize the results. The findings were 1) the adjustment problems of first - borns, middle - barns and last - barns were not statistically different at the .05 level. 2) the teacher is opinion scores were correlated with the Mooney problem Check Lists score which were checked by students themselves significantly at the .05 level.