Table 3.

Effect sizes in writing quality, writing productivity, writing fluency, and other for students with weak versus typical writing skills (top panel), and moderation by instructional focus and writing skill status (bottom panel)

	Writing Quality		Writing Productivity		Writing Fluency		Writing: Other
Variable	Parameter (s.e.)	Z value/P value	Parameter (s.e.)	Z value/P value	Parameter (s.e.)	Z value/P value	Parameter (s.e.)	Z value/P value
Intercept	.08(.22)	.37/.71	.47(.18)	2.63/.01	−.07(.45)	−.14/.89	.32(.14)	2.38/.02
Weak writing skill	.47(.31)	1.52/.13	−.25(.22)	−1.14/.25	.42(.64)	.65/.52	.04(.27)	.16/.87
Intercept	−.98(.23)	−4.29/.00	.38(.26)	1.48/.14	NA	NA	.29(.18)	1.58/.11
SRSD	1.32(.29)	4.57/.00	.07(.31)	.21/.83	NA	NA	.39(.26)	1.53/.13
Weak writing skill	.92(.27)	3.43/.00	−.41(.28)	−1.47/.14	NA	NA	−.08(.28)	−.29/.77
SRSD*Weak writing skill	−.06(.36)	−.17/.86	.70(.38)	1.85/.06	NA	NA	.24(.45)	.52/.60

SRSD = Self-regulated strategy instruction; Mixed = Instructional content varies