Table 4.

Ratio of occurrence of infant behaviors over the peekaboo rounds.

	Attempts uncover	Initiation cover	Smiles	Vocalizations
4 MONTHS N = 19
Mean	0.40	0.06	1.77	2.27
SD	0.27	0.09	0.82	1.58
Minimum	0.00	0.00	0.34	0.00
Maximum	0.84	0.39	3.88	6.17
6 MONTHS N = 19
Mean	0.58	0.04	2.10	2.10
SD	0.42	0.06	0.69	1.57
Minimum	0.00	0.00	0.62	0.46
Maximum	1.50	0.19	3.00	7.50