In response to recommendations to redefine statistical significance to P ≤ 0.005, we propose that researchers should transparently report and justify all choices they make when designing a study, including the alpha level.,
Nature Human Behaviour
Department of Psychology

Lakens, D., Adolfi, F.G. (Federico G.), Albers, C.J. (Casper J.), Anvari, F. (Farid), Apps, M.A.J. (Matthew A. J.), Argamon, S.E. (Shlomo E.), … Zwaan, R. (2018). Justify your alpha. Nature Human Behaviour, 1–4. doi:10.1038/s41562-018-0311-x