Table 1.

Outline of study design. The dependent variables collected in Desirable Gift Tasks 2 and Disappointing Gift Task 3 were compared to dependent variables collected in Baseline Task 1.

Baseline Task (1)	Desirable Gift Condition			Desirable Gift Task (2)	Disappointing Gift Condition			Disappointing Gift Task (3)
Disfluency Data	Positive Expressive Behavior	Negative Expressive Behavior	Engage With Gift	Disfluency Data	Positive Expressive Behavior	Negative Expressive Behavior	Engage With Gift	Disfluency Data

Note: Positive Expressive Behaviors coded: (1) Related broad smile (teeth showing); (2) Closed lip smile; (3) Giggling, laughing; and (4) Use of expressive hand gestures while talking. Negative Expressive Behaviors coded: (1) Tense, square-looking smile (lips open, teeth may show); (2) Down-turned mouth (i.e., frown/ grimace); (3) Sharp breath exhalation, snorting, groaning; and (4) Sighing.