Table 2.

Comparison of CAT and non-adaptive testing (NAT) in measurement efficiency with the t-test

	Mean	Variance	Observed	Maximum	Minimum	p-value
Estimated Ability:
NAT	-0.23	9.19	826	5.22	-8.62	.78
CAT	-0.20	8.92	826	4.76	-8.62
Test length:
NAT	23	0	826	23	23	< .001
CAT	13.42	62.04	826	23	5