noun
regression to an earlier stage
Psychological term for reverting to an earlier developmental stage, often infantile behavior, under stress.
ストレスが原因で退行現象が起こることがある。
Regression can occur due to stress.
幼児退行現象は、大人が子供のような行動をとることを指す。
Infantile regression refers to adults behaving like children.
Compound of 退行 (regression, retrogression) and 現象 (phenomenon).