Table 6.

Estimated Reliabilities of Single Assessments and of the Across-Session Means and Standard Deviations

	(Version)/session						Across-session
	(O)1		(A)2		(B)3		M		SD
Variable	Study 1	Study 2	Study 1	Study 2	Study 1	Study 2	Study 1	Study 2	Study 1	Study 2
Vocabulary	.92	.88	.91	.83	.90	.85	.97	.95	.65	.47
Picture vocabulary	.91	.85	.85	.80	.84	.81	.94	.94	.15	.35
Synonym vocabulary	.78	.82	.70	.65	.61	.59	.90	.87	−.11	.28
Antonym vocabulary	.81	.79	.80	.60	.62	.59	.90	.85	.25	.10
Matrix reasoning	.85	.82	.86	.81	.85	.85	.94	.92	.26	.08
Letter sets	.73	.74	.70	.68	.45	.60	.86	.86	−.02	.22
Shipley	.87	.84	.87	.81	.90	.83	.95	.94	.24	.08
Spatial relations	.87	.90	.73	.70	.75	.70	.92	.91	.28	.23
Paper folding	.77	.73	.73	.68	.81	.80	.93	.85	.38	.08
Form boards	.92	.87	.92	.90	.76	.72	.95	.93	.83	.57
Recall	.92	.89	.95	.92	.92	.91	.97	.96	.57	.54
Logical memory	.73	.84	.76	.85	.72	.83	.85	.82	.17	.07
Paired associates	.86	.83	.84	.83	.82	.87	.94	.91	.52	.39
Letter comparison	.83	.87	.90	.84	.79	.84	.94	.95	.34	.26
Pattern comparison	.93	.86	.87	.89	.92	.90	.97	.92	.02	.44

Note. Reliability estimates from the individual (versions) sessions were based on coefficient alpha across individual items, and those across sessions correspond to coefficient alpha for the scores based on odd-numbered and on even-numbered items in each session. No reliability estimates were available for the digit symbol variable, because it was based on a single timed score in each session.