FIGURE 3.

Baby B’s expressive actions at different moments in interaction with his mother. The columns correspond to the four phases of a narrative of purposes and experiences supported by the vocalizations of his mother numbered in Figure 4 After a period of intense, pleasurable self-expression, with his mother’s happy participation, B withdraws, and his mother attempts to provoke new engagement by ‘teasing’ or ‘joking’ about his behaviors. See detailed description in the text.