Table 4.

Expected g Coefficients for Various Decision (D) Study Designs in Fully Crossed Homogeneous Samples (PRI)

No. of Raters × No. of Items		RCS Cognitive g			RCS Affective g			RCS Motor g
n'r	n'i	Grades K-l	Grades 2–3	Grades 4–5	Grades K-l	Grades 2–3	Grades 4–5	Grades K-l	Grades 2–3	Grades 4–5
1	3	.41	.44	.54	.55	.64	.58	.51	.65	.64
	6	.48	.53	.69	.60	.70	.66	.55	.68	.71
	12	.53	.58	.80	.63	.73	.70	.57	.70	.74
	20	.55	.61	.85	.65	.75	.72	.58	.71	.76
3	3	.66	.68	.74	.78	.83	.79	.75	.84	.82
	6	.72	.75	.85	.81	.87	.84	.78	.87	.87
	12	.76	.80	.91	.84	.89	.87	.80	.88	.89
	20	.78	.82	.94	.84	.90	.88	.80	.88	.90
5	3	.75	.76	.80	.84	.88	.86	.83	.90	.87
	6	.81	.82	.89	.88	.91	.90	.85	.91	.91
	12	.84	.86	.94	.89	.93	.92	.87	.92	.93
	20	.85	.88	.96	.90	.93	.93	.87	.93	.94
8	3	.81	.81	.84	.89	.91	.90	.88	.93	.91
	6	.86	.87	.91	.91	.94	.93	.90	.94	.94
	12	.89	.90	.95	.93	.95	.94	.91	.95	.95
	20	.90	.92	.97	.93	.96	.95	.91	.95	.96
10	3	.83	.83	.86	.91	.93	.91	.90	.95	.92
	6	.88	.89	.92	.92	.95	.94	.92	.95	.94
	12	.91	.92	.96	.94	.96	.95	.93	.96	.96
	20	.92	.93	.97	.95	.96	.96	.93	.96	.96

Note. g = predicted generalizability coefficient for a D study with the specified number of items (I) and raters (R), when items and raters are crossed with persons (P; i.e., same group of raters for each ratee); RCS = Response to Challenge Scale; n'i = number of items; n'r = number of raters. Results are based on the same Ns reported in Tables 1–3 for homogeneous groups.