Table 5.

Definition of Child Behaviors Observed With Mother and Generalizability Coefficients (r)

Behavior	Definition
Social behaviors
Cooperationb	Behaviors used in response to a maternal request for information (e.g., Mother asks, “What is the name of that picture?” while pointing to picture in book, and child attempts to follow mother’s request with behavior or words; r = .62).
Social engagementa	Degree to which child positively engaged mother through use of affect, eye gaze, gestures, joint attention, and verbal-nonverbal communication demonstrating an interest in the interaction (r = .65).
Positive affectb	Displays of smiles and laughs (r = .85).
Communication behaviors use of wordsb	Six levels were coded for each attention directing event; single utterance sound, babbling with sentence like intonation, word approximation-single words, two- to three-word phrases, four- to five-word phrases, and > six words (r = .68).
Coordination of attention and use of wordsb	Frequency with which children were able to coordinate joint attention between their mother and objects in combination with using words (r = .68).

Note. Values in parentheses are generalizability coefficients (r) for interrater reliability.

^aCoded using a 5-point rating scale.

^bCoded as a frequency.