Table 1.

Production Rates per 10 Mins. for Low- (LR) and High-Risk Infant-Initiated Communicative Types at 13 and 18 Months of Age

	LRs (N=15)				HRs (N=15)
	13 mo.		18 mo.		13 mo.		18 mo.
	M (SE)	95% CI	M (SE)	95% CI	M (SE)	95% CI	M (SE)	95% CI
Communication Rate	11.09 (1.01)	[9.11, 13.07]	17.02(2.03)a	[13.04, 21.00]	8.28 (1.61)	[5.12,11.44]	10.55 (1.76)a	[7.10,14.00]
CNWVs	8.47 (0.79)a	[6.92, 10.02]	5.88 (0.67)	[4.57, 7.19]	6.43 (1.23)	[4.02, 8.84]	4.03 (0.66)a	[2.74, 5.32]
Words	1.17 (0.35)	[0.48, 1.86]	8.69 (1.70)a	[5.36, 12.02]	0.54 (0.28)	[0.00, 1.09]	4.60 (1.46)	[1.74, 7.46]
Deictic Gestures	3.18 (0.45)	[2.30, 4.06]	7.01 (1.18)	[4.70, 9.32]	2.54 (0.82)	[0.93, 4.15]	4.45 (0.94)	[2.61, 6.29]
Reach/Request	0.88 (0.16)a	[0.57, 1.19]	0.49 (0.15)	[0.20, 0.78]	0.87 (0.25)	[0.38, 1.36]	0.58 (0.13)	[0.33, 0.83]
Give	0.61 (0.13)	[0.36, 0.86]	1.63 (0.31)	[1.02, 2.24]	0.49 (0.15)	[0.20, 0.78]	2.37 (0.65)	[1.10, 3.64]
Show	0.78 (0.16)	[0.47, 1.09]	1.24 (0.33)	[0.59, 1.89]	0.22 (0.05)	[0.12, 0.32]	0.33 (0.09)	[0.15, 0.51]
Point	0.90 (0.39)	[0.14, 1.66]	3.64 (0.80)	[2.07, 5.21]	0.96 (0.59)	[0.00, 2.12]	1.19 (0.37)	[0.46, 1.92]
Gestures+CNWVs	1.57 (0.28)b	[1.02, 2.12]	2.18 (0.38)	[1.44, 2.92]	1.01 (0.42)	[0.19, 1.83]	1.47 (0.44)	[0.61, 2.33]
Gestures+Words	0.16 (0.07)	[0.02, 0.30]	2.38 (0.64)	[1.13,3.63]	0.21 (0.15)	[0.00, 0.50]	1.08 (0.49)	[0.12, 2.04]
Combination Repertoire	3.13 (0.34)	[2.46, 3.80]	4.47 (0.53)	[3.43, 5.51]	1.67 (0.42)	[0.85, 2.49]	3.53 (0.70)	[2.16, 4.90]

^acontained no outliers;

^bcontained two outliers; all other distributions had a single outlier.