The objectives of the study were: (1) To construct the scale to evaluate the supervision practice and the attitude of educational supervisors towards supervision practice. (2) To study the level of the existing situation of supervision practice in Thailand, Laos and Malaysia. (3) To compare the mean scores of the level of the existing situation of supervision practices in Thailand, Laos and Malaysia. (4) To study the level of attitude of educational supervisors towards the supervision practice in Thailand, Laos and Malaysia. (5) To compare the mean scores of the level of attitude of educational supervisors towards the supervision practice in Thailand, Laos and Malaysia.

The hypotheses of study were: (1) There is no significant difference between the mean scores of supervision practice in Thailand, Laos and Malaysia. (2) There is no significant difference between the mean scores of supervision practice objectives of supervision aspect in Thailand, Laos and Malaysia. (3) There is no significant difference between the mean scores of supervision practice principal of supervision aspect in Thailand, Laos and Malaysia. (4) There is no significant difference between the mean scores of supervision practice educational supervision personal aspect in Thailand, Laos and Malaysia. (5) There is no significant difference between the mean scores of supervision practice roles and functions of educational supervision aspects in Thailand, Laos and Malaysia. (6) There is no significant difference between the mean scores of supervision practice attributes pertaining to the educational supervision aspect in Thailand, Laos and Malaysia. (7) There is no significant difference between the mean scores of supervision practice activities of supervision aspect in Thailand, Laos and Malaysia. (8) There is no significant difference between the mean scores of supervision practice process of educational supervision aspects in Thailand, Laos and Malaysia. (9) There is no significant difference between the mean scores of supervision practice in Thailand, Laos and Malaysia regarding supervision practice. (10) There is no significant difference between the mean scores of supervision practice in Thailand, Laos and Malaysia regarding job satisfaction aspects. (11) There is no significant difference between the mean scores of supervision practice in Thailand, Laos and Malaysia regarding recognition aspect. (12) There is no significant difference between the mean scores of supervision practice in Thailand, Laos and Malaysia regarding challenging of work aspect. (13) There is no significant difference between the mean scores of supervision practice in Thailand, Laos and Malaysia regarding knowledge about innovation aspect. (14) There is no significant difference between the mean scores of supervision practice in Thailand, Laos and Malaysia regarding progress of educational supervision.

Sample comprised of 800 educational supervisors in Thailand (471), Laos (52) and Malaysia (277). The multi-stratified simple random sampling method was applied.

For data collection scale was constructed and standardized by the investigator. There was two pairs of the scale (a) the different aspects of supervision practice, and (b) the different aspects of attitude of educational supervisors towards supervision practice. The test-retest and split-half reliability coefficients of the scale were 0.85 and 0.87 respectively. The content validity and construct validity of scale were highly satisfactory.

The percentage, mean, SD, F-test and standardized range statistic test (q) were employed to analyse the data.

The findings of the study were: (1) The level of the existing situation of the supervision practice in Thailand, Laos and Malaysia obtained the total mean scores at high level. It was further found that the mean scores of supervision practice in Thailand, Laos and Malaysia were in high, medium and high level respectively. (2) The mean score of supervision practice in Laos obtained the smaller value than that of the mean score of the objectives of supervision aspect in Thailand and Malaysia. (3) The mean scores of the principals of supervision in Laos obtained the smaller value than that of the mean scores of the principals of supervision aspect in Malaysia and Thailand. (4) The mean scores of the educational supervision personal aspect in Malaysia obtained the greater value than that of the means scores of the mean score of the educational supervision personal aspect in Thailand and Laos. (5) The mean scores of the roles and functions of supervision aspect in Laos obtained smaller value than that of in Thailand and Malaysia. (6) The mean score of the attribute pertaining to educational supervision aspect in Laos obtained the smaller value than that of the mean score of the attribute pertaining to educational supervision aspect in Thailand and Malaysia. (7) The mean score of the activities of supervision aspect in Laos obtained the smaller value than that of in Thailand and Malaysia. (8) The mean score of the process of educational supervision aspect in Laos obtain the smaller value than that of the Thailand and Malaysia. (9) The level of the attitude of educational supervisors towards the supervision practice in Thailand, Laos and Malaysia obtained the total mean scores at high level. It was further found that the mean scores of the different aspects of attitude of educational supervisors towards supervision practice in Thailand, Laos and Malaysia were in high level. (10) There was no significant difference between the mean scores of attitude of educational supervisors towards supervision practice in Thailand, Laos and Malaysia. (11) The mean scores of the job satisfaction aspect of attitude of educational supervisors in Laos obtained smaller value than that of in Thailand and Malaysia. The mean scores of the job satisfaction aspect of attitude of educational supervisors in Thailand obtained smaller value than that of Thailand obtained smaller value than that of in Malaysia. (12) The mean score of the recognition aspect of attitude of educational supervisors in Laos obtained the greater value than that of the mean score of the recognition aspect of attitude of educational supervisors in Thailand and Malaysia.