. Author manuscript; available in PMC: 2015 Aug 4.

Published in final edited form as: J Child Psychol Psychiatry. 2013 Oct 10;55(3):237–246. doi: 10.1111/jcpp.12139

Table 1.

Means and standard deviations for the four groups on theT1 and T2 motor skills measures. Main effects and interactions from the 2×2 ANOVA are also displayed.

	TD			FR			LI			FRLI			Main effect				Interaction
													FR		LI		FR × LI
Measures	N	Mean	SD	N	Mean	SD	N	Mean	SD	N	Mean	SD	F	η _p ²	F	η _p ²	F	η _p ²
T1 Tasks
Posting Coins pref (sec)	69	27.77_a	5.24	83	30.86_b	8.46	31	46.26_c	29.83	29	34.48_bc	10.56	4.48^*	0.02	29.05^**	0.12	13.12^**	0.06
Posting Coins non-pref (sec)	69	32.23_a	8.04	81	35.23_ab	9.37	24	47.75_c	19.65	29	39.45_bc	12.47	2.2	0.01	30.52^**	0.13	10.02^**	0.05
Threading Beads (sec)	69	55.84_a	17.98	81	63.41_ab	32.96	28	84.21_b	44.19	27	68.56_ab	28.32	0.72	0.00	12.43^**	0.06	5.97^*	0.03
Bicycle Trail errors	66	7.68_a	3.99	81	8.91_ab	3.94	29	12.17_c	5.84	27	11.15_bc	5.35	0.02	0.00	22.85^**	0.10	2.57	0.01
T1 Motor factor score	69	−0.45_a	0.43	83	−0.14_b	0.71	32	0.98_c	1.32	29	0.38_c	0.67	1.53	0.01	71.20^**	0.25	15.36^**	0.07
T2 Tasks
Posting Coins pref (sec)	69	23.14_a	3.60	83	24.51_a	8.69	31	30.59_b	10.52	28	26.29_ab	6.19	1.67	0.01	16.41^**	0.07	6.19^*	0.03
Posting Coins non-pref (sec)	69	26.70_a	4.97	83	27.72_ab	7.08	31	35.61_b	16.36	29	29.86_ab	6.85	3.29	0.02	18.00^**	0.08	6.77^*	0.03
Threading Beads (sec)	68	36.13_a	10.02	83	41.49_ab	24.31	31	54.35_b	24.35	29	42.83_ab	16.59	1.04	0.01	10.49^**	0.05	7.83^**	0.04
Bicycle Trail errors	69	3.72_a	3.31	83	5.05_ab	4.52	30	7.13_b	4.88	29	6.28_b	3.83	0.14	0.00	13.40^**	0.06	2.97	0.01
T2 Motor factor score	69	−0.41_a	0.45	83	−0.09_b	0.91	32	0.81_c	1.20	29	0.35_c	0.70	0.29	0.00	44.51^**	0.18	9.71^**	0.04
Age of walking (mnths)	69	13.45_ab	2.37	81	12.56_a	2.33	32	14.58_b	3.24	29	13.41_ab	3.38	6.43^*	0.03	6.00^*	0.03	0.12	0.00
T2 DCDQ
Dynamic Motor Control (/30)	62	21.87_a	4.33	76	22.34_a	4.17	28	19.25_a	6.02	24	22.29_a	4.93	5.40^*	0.03	3.12	0.02	2.89	0.02
Fine Motor (/20)	60	15.55_a	3.60	76	14.95_a	3.67	28	11.18_b	5.05	25	13.44_ab	4.01	1.69	0.01	21.28^**	0.10	5.05^*	0.03
General Co-ordination (/25)	62	20.06_a	3.81	77	19.58_ab	3.91	29	17.14_b	4.70	25	17.80_ab	4.85	0.02	0.00	12.53^**	0.06	0.74	0.00
Total (/75)	60	57.50_a	9.33	75	57.04_a	9.05	27	47.59_b	14.16	24	53.08_ab	11.34	2.19	0.01	16.62^**	0.08	3.06	0.02

Note:

p<.05;

^**

p<.01;

means with different subscripts are significantly different (Games Howell post-hoc comparison). Family risk only (FR), language impaired only (LI), family risk and language impaired (FRLI) and typically developing (TD). High Motor factor scores reflect poor performance.