Table 2.

Estimates of Score Reliability for Two Test Forms of GAT-V and GTT Under Two Approaches to Estimation (α and LVM).

		LVM-based estimation
Test data	Cronbach’s α	${\hat{\rho }}_{\mathrm{XX}}$	95% CI for ${\hat{\rho }}_{\mathrm{XX}}$
GAT-V(B)a	.731	.848	[.843; .853]
GAT-V(N)b	.776	.883	[.879; .887]
GTT	.783	.879	[.877; .881]

Note. GAT-V = General Aptitude Test–Verbal; GTT = General Teacher Test; LVM = latent variable modeling; CI = confidence interval. Cronbach’s α assumes that the measures are essentially tau-equivalent, whereas the LVM approach does not require this assumption.

^aGAT-V base form.

^bGAT-V new form.