Athiworakun, C., Pawabunsiriwong, K., Astsawaraksawong, N. and Adunyarittigun, D. 2026. The Washback Effects of the Thai General Aptitude Test (TGAT1) (English Communication) on Teaching in the Upper Secondary School Level in the Bangkok Area . LEARN Journal: Language Education and Acquisition Research Network. 19, 2 (Jul. 2026), 532–557. DOI:https://doi.org/10.70730/ZMWP9429.