Change over time in the type and functions of crib speech around the fourth birthday
Weir, R.H.
· 1981
★ NIFPlay Rating: 3
Rating Scale
10 Rigorous play-specific science
6–9 General biological science
5 Sound play research (uncontrolled)
1–4 Less rigorous / indirect
0 Indirect but high value
Classic linguistic study of children's spontaneous pre-sleep monologues, documenting how crib speech shifts from practice and repetition toward narrative play with language.
