Résumé
This study aimed to investigate the articulation characteristics of Thai children. Subjects were 560 students aged 3-10 years in Bangkok Metrolitan area. They were divided into 8 groups according to their age. Every subject was assessed his/her articulation characteristics by using the Thai Articulation Test (TAT)4, which consisted of 69 black-white drawing pictures. Each picture represents Thai phonemes: tonal features, vowels, consonants and clusters. Results of this study indicated that all subjects mastered every tonal feature and vowel within the age 3 years. At 3 years of age, the children produced all consonants correctly, except the /r/ sound. There were 15% of 10 years old children acquired accurately. There was a significant correlation between articulation abilities and ages. This study revealed that there was no different between two genders. As a result, the TAT appeared to be a valid and reliable test for clinical and research uses for the dynamic present situation.