Table 5 .

Breadth of coverage for variable length CAT, fixed length CAT, 10-item short form, and full item bank

Mode	N	T Score				Standard Error
		Mean±SD	Range	% Ceiling	% Floor	Mean±SD	Range
Variable-length CAT (min 4)	716	54.35 ± 7.94	26.66–72.23	3.49%	0.14%	0.251 ± 0.0517	0.202–0.462
Variable-length CAT (min 8)	716	54.43 ± 7.92	26.66–72.23	3.49%	0.14%	0.203 ± 0.0672	0.148–0.462
10-item fixed-length CAT	716	54.46 ± 7.95	23.27–71.86	4.47%	0.14%	0.191 ± 0.0759	0.134–0.467
10-item short form	716	54.41 ± 7.70	26.7–68.6	9.92%	0.14%	0.213 ± 0.0946	0.140–0.480
Full bank	716	54.49 ± 7.92	28.2–73.2	3.07%	0.14%	0.139 ± 0.0714	0.100–0.450