Table 4.

Incidence Rates, Kappa, ASA, and Consistency Values for Alternative Definitions of Reading Disabilities with Cut-Points at the 15th Percentile

		Incidence
Classification	Type of Growth	Grade 1	Grade 2	Kappa	ASA	Consistency
Low NWF	Stable-Growth	.15	.15	.34	.28	.43
Low NWF	Mastery Learning	.15	.15	.30	.26	.40
Low NWF	Fan-spread	.15	.15	.40	.33	.49
Unexpected NWF	Stable-Growth	.15	.15	.28	.24	.39
Unexpected NWF	Mastery Learning	.15	.15	.23	.21	.34
Unexpected NWF	Fan-spread	.15	.15	.35	.28	.44
Low ORF	Stable-Growth	.15	.15	.53	.43	.59
Low ORF	Mastery Learning	.15	.15	.44	.35	.53
Low ORF	Fan-spread	.15	.15	.55	.45	.62
Unexpected ORF	Stable-Growth	.15	.15	.47	.38	.55
Unexpected ORF	Mastery Learning	.15	.15	.29	.25	.40
Unexpected ORF	Fan-spread	.15	.15	.47	.38	.55
Dual Discrepancy	Stable-Growth	.14	.14	.78	.69	.84
Dual Discrepancy	Mastery Learning	.07	.07	.28	.20	.37
Dual Discrepancy	Fan-spread	.10	.10	.31	.23	.30
ANY1PLUS	Stable-Growth	.33	.33	.60	.58	.75
ANY1PLUS	Mastery Learning	.31	.31	.54	.52	.70
ANY1PLUS	Fan-spread	.30	.30	.59	.56	.74
ANY2PLUS	Stable-Growth	.16	.16	.72	.61	.75
ANY2PLUS	Mastery Learning	.14	.14	.58	.47	.63
ANY2PLUS	Fan-spread	.14	.14	.68	.57	.72

Note: ASA = Affected Status Agreement Statistic, NWF=Nonword Fluency, ORF=Oral Reading Fluency, ANYPLUS1=Has at least one or more of the five possible classifications of reading disabilities at both time points, ANYPLUS2=Has at least two or more of the five possible classifications of reading disabilities at both time points.