Figure 3.

Mother multimodally presenting a book, holding it within reach of her infant: Introducing the book to the infant (A), marking the animals on the title page by dynamical pointing and vocal labeling (B–D), opening the book with the infant attending (E,F), more dynamical pointing drawing the infant's attention (G,H), who subsequently acts on the book (I,J). Below the camera stills, an ELAN analysis detail documents, from top to bottom: audio traces (pitch in red and intensity in green), and annotation tiers. Tier label abbreviations used (from top to bottom): mothervoc: mother vocalizations, motheract: mother (manual) actions, babyact: infant actions, babygaze: infant gaze, and babyvoc: infant vocalizations. r: right, l: left.