Together with collaborators Stuart Webb and Akifumi Yanagisawa, Takumi Uchihara has published a new paper on second language incidental vocabulary learning. The work appears in Language Teaching and is a meta-analysis of 24 primary studies. See the link below for more details.
Stuart Webb; Takumi Uchihara; Akifumi Yanagisawa. (2023) How effective is second language incidental vocabulary learning? A meta-analysis. In Language Teaching, 1-20.
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0261444822000507