Table 1.

Descriptive statistics for the composition and handwriting fluency variables of two writing samples of Grade 4 and Grade 7.

	Grade 4								Grade 7
	Sample A				Sample B				Sample A				Sample B
	Mean	SD	Skewness	Kurtosis	Mean	SD	Skewness	Kurtosis	Mean	SD	Skewness	Kurtosis	Mean	SD	Skewness	Kurtosis
Macro-organization
Topic	.97	.18	−5.40	27.53	.99	.11	−8.86	77.45	.92	.27	−3.08	7.56	.88	.33	−2.29	3.28
Logical ordering or idea	2.09	.60	−.03	−20	2.24	.60	−.14	−.48	2.10	.83	.06	−1.04	2.32	.94	−.02	−1.02
Number of key elements	1.86	.52	−.17	.42	2.04	.54	.03	.53	1.91	.70	.12	−.95	2.05	.78	−.08	−1.35
Complexity
Mean length of T-units	25.12	7.01	.96	1.34	22.98	9.00	2.19	7.95	32.16	12.32	2.88	15.76	30.53	11.41	1.15	2.29
Clause density	13.07	3.24	2.42	10.35	10.46	2.27	.83	1.96	14.56	3.71	1	2.31	14.94	6.47	4.97	44.38
Productivity
Total number of words	127.04	51.22	.29	−.65	103.54	46.70	.51	−.45	203.32	82.10	.20	−.40	196.60	81.42	.12	−.75
# of different words	74.84	27.93	.77	.93	73.69	28.20	.20	−.73	145.91	59.93	.42	.21	146.13	56.66	.25	−.17
Spelling and punctuation
# of phonological error	.66	1.18	2.14	4.27	.80	.93	.88	−.27	.41	.79	2.12	4.34	.38	.72	2.15	5.13
# of orthographical errors	.70	.96	1.33	1.15	.60	1.05	2.33	6.21	.26	.59	2.68	7.90	.27	.70	3.56	14.60
# of period errors	.92	1.87	3.18	11.98	.71	1.56	2.66	7.25	.00	.00	—	—	.01	.08	12.92	167.00
Handwriting fluency
Stroke printing fluency	33.00	13.24	.59	.20	33.00	13.24	.59	.20	67.17	21.31	.88	1.23	67.17	21.43	.88	1.18
Sentence copying fluency	14.26	4.02	.86	1.53	14.26	4.02	.86	1.53	30.44	8.54	2.29	9.44	30.44	8.54	2.29	9.44