Tadashi Koyama. Current research on individual differences in early expressive word acquisition. Journal of Special Education Research,. 2021. 11. 1. 11-21
Children’s daily play at their home and early language development.
(49th Annual Meeting of the Society of Jean Piaget, P01-14, Portland, Oregon, USA. 2019)
Early gestures, actions on objects, and language comprehension in the children with developmental disorders: Precursors to language.
(48th Annual Meeting of the Jean Piaget Society, Poster Session 1, 19, Amsterdam, Netherland . 2018)