Microdevelopment in Parent-Child Conversations: From Global Changes to Flexibility

Abstract

In previous studies we demonstrated that the speech of a language-acquiring child and that of her parent can be characterized as a transactional process of dynamic adaptation. We reported a striking attunement between child and parent in the global development of mean length of utterance and utterance length between the ages of 1.5 and 2.5 years. Here we present a reanalysis of these data, focusing on the utilization of different categories of utterance length. In particular we analyzed the temporal structure of the dialogue on the linguistic level using the technique of cross-recurrence quantification. This type of analysis enabled us to study the interaction between interlocutors at the microlevel, revealing the dynamics of child-parent conversation and how this changes over time. Results showed decreasing values for measures quantifying the vertical line structures as well as an increasing average length of the diagonal lines in the recurrence plot. This was interpreted as indicating an increasing flexibility in the patterns of parent-child dialogue over the period of 1 year.

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