Table 3.

Average Test Length for Different SPRT Settings for UCCT and MCCT.

Condition	$\alpha =0.05$			$\alpha =0.10$
	${\delta }^{*}=1.25$	${\delta }^{*}=2.50$	${\delta }^{*}=5.00$	${\delta }^{*}=1.25$	${\delta }^{*}=2.50$	${\delta }^{*}=5.00$
Random item selection
MIRT	50.000	50.000	49.961	50.000	50.000	49.378
UIRT	50.000	50.000	49.772	50.000	50.000	48.474
Item selection by maximization at the ability estimate
MIRT	50.000	50.000	49.384	50.000	50.000	46.280
UIRT	50.000	50.000	48.044	50.000	49.979	45.116
Item selection by maximization at the cutoff point
MIRT	50.000	50.000	47.944	50.000	49.945	44.041
UIRT	50.000	49.855	43.902	50.000	48.730	38.366

Note. Simulations for classifications with UIRT and MIRT with a flexible test length. SPRT = sequential probability ratio test; UCCT = unidimensional computerized classification testing; MCCT = multidimensional computerized classification testing; MIRT = multidimensional item response theory; UIRT = unidimensional item response theory; $\alpha =\beta$ = acceptable error rates; ${\delta }^{*}$ = percentile point that was used to calculate the boundary of the indifference region.