Table 4.

Percentage of Participants Committing None (N) or Some (S) Errors by Group or Grade

	Group								Grade
	No LD		RD		MD		MD+RD		3		4
Error Type	N	S	N	S	N	S	N	S	N	S	N	S
Math fact	65	35	62	38	49	51	47	53	51	49	62	38
Procedural bugs	74	26	70	30	37	63	34	66	43	57	68	32
Procedural slips	53	47	56	44	41	59	49	51	41	59	62	38
Visual-spatial	94	6	83	17	90	10	81	19	83	17	92	8
Switch	80	20	82	18	76	24	73	27	76	24	79	21

Note: MD = math difficulty; MD+RD = math and reading difficulty; No LD = no learning difficulty; RD = reading difficulty.