Abstract
The speech of mothers and their 1-year-old infants was compared in the home and in the laboratory playroom. The home and laboratory settings were similar for measuring the number of actual words that infants spoke and were similar for measuring the complexity of the mother's speech, including the number of different words, the type-token ratio, and the length of the utterances. Infants vocalized at similar rates in the two settings, but mothers spoke at a faster rate in the laboratory playroom. The usefulness of a preliminary warm-up period was supported by the finding that for the second half of the sessions, mothers slowed their rate of speech and increased the complexity of their speech.
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Stevenson, M.B., Leavitt, L.A., Roach, M.A. et al. Mothers' speech to their 1-year-old infants in home and laboratory settings. J Psycholinguist Res 15, 451–461 (1986). https://doi.org/10.1007/BF01067725
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DOI: https://doi.org/10.1007/BF01067725