Table 1.

Descriptive statistics of free-play behaviors (based on each dyad’s average per object of each solidity type).

	Free-play behaviors per object	Solidity	Mean (SD)	Range
Caregiver naming	Number of instances	Solid	2.98 (2.66)	0.00–8.67
		Nonsolid	1.67 (1.59)	0.00–5.67
Child manual exploration	Number of total manual actions	Solid	12.26 (3.57)	6.00–19.33
		Nonsolid	6.07 (3.39)	1.33–13.67
	Number of whole-handed actions	Solid	10.24 (2.80)	5.33–14.00
		Nonsolid	3.19 (2.54)	0.00–7.33
Coordinated exploration	Number of instances	Solid	7.93 (2.28)	5.00–12.33
		Nonsolid	2.74 (2.09)	0.00–6.00
	Ratio of instances to whole-hand actions	Solid	0.77 (0.12)	0.59–0.93
		Nonsolid	0.61 (0.28)	0.00–1.00
	Duration of instances (sec)	Solid	5.04 (2.93)	2.30–12.80
		Nonsolid	5.34 (3.99)	0.00–14.33
Synchronous naming	Number of instances	Solid	1.07 (1.25)	0.00–3.33
		Nonsolid	0.36 (0.50)	0.00–1.33
	Ratio of instances to coordinated exploration instances	Solid	0.19 (0.23)	0.00–0.58
		Nonsolid	0.10 (0.15)	0.00–0.47