Table 2.

Summary of spline logistic regression for playing by country

Country	M	SD	Knot estimate	rpb (0–5mo)	rpb (6–11mo)
High HDI	.83	.37	4.000	.35***	.08***
Albania	.73	.44	5.000	.46***	−.01
Belarus	.94	.23	4.000	.40***	.07
Bosnia and Herzegovina	.93	.26	1.071	.32***	.08
Kazakhstan	.76	.43	8.000	.39***	.09
Macedonia	.82	.39	−1.333	.24***	.15*
Montenegro	.89	.32	11.059	.51***	.26*
Serbia	.76	.43	6.749	.37***	.07
Trinidad and Tobago	.97	.18	−4.658	−.09	.07
Medium HDI	.67	.50	4.482	.25***	.05***
Bangladesh	.66	.47	4.480	.26***	.03
Belize	.92	.26	11.490	.16	.18
Cameroon	.80	.40	4.018	.33***	.06
Djibouti	.11	.32	−8.223	.04	−.01
Georgia	.83	.38	3.799	.38***	.10
Ghana	.84	.36	1.277	.30***	.06
Guyana	.86	.34	2.543	.29***	.02
Jamaica	.94	.25	4.232	.27***	.14
Kyrgyzstan	.50	.50	7.869	.27***	.05
Laos	.53	.50	3.000	.14**	.03
Mauritania	.46	.50	4.544	.34***	.06
Mongolia	.53	.50	7.000	.34***	.10
Suriname	.89	.31	4.000	.18*	.08
Syria	.65	.48	6.457	.25***	.03
Tajikistan	.58	.49	8.743	.25***	.11*
Thailand	.92	.27	3.586	.29***	.08*
Uzbekistan	.55	.50	6.484	.31***	.07
Vanuatu	.86	.35	6.000	.22**	.00
Vietnam	.82	.39	4.000	.25***	.13*
Yemen	.61	.49	6.647	.26***	.10*
Low HDI	.71	.45	4.108	.20***	.04***
Burkina Faso	.56	.50	4.384	.29***	.01
Central African Republic	.61	.49	6.405	.18***	.00
Côte d’ Ivorie	.85	.35	4.735	.22***	.06
Gambia	.56	.50	3.310	.29***	.13***
Guinea-Bissau	.52	.50	1.651	.18***	.09*
Nigeria	.81	.39	2.798	.17***	.05
Sierra Leone	.96	.20	1.000	.13**	.10*
Togo	.76	.43	4.000	.23***	−.01
HDI N/A	.68	.47	3.678	.28***	.06***
Iraq	.68	.47	3.405	.28***	.08**
Somalia	.69	.46	4.323	.27***	.03
TOTAL	.70	.46	4.916a	.24***	.05***

Note. HDI = Human Development Index. Correlations that significantly changed at 5 months of age are bolded.

^*p ≤ .05.

^**p ≤ .01.

^***p ≤ .001.

^aAverage of individual country knots excluding out-of-range estimates.