Table 2.

Spearman’s correlation coefficients (r) between each of the short forms of the BNT and the full 60-item version and Cronbach’s α of all versions

Version	All		Normal		MCI		Dementia
	r	α	r	α	r	α	r	α
CERAD BNT-15	0.689	0.758	0.593	0.386	0.735	0.612	0.871	0.797
Lansing15	0.831	0.866	0.733	0.637	0.885	0.779	0.936	0.889
Mack15.1	0.823	0.827	0.726	0.525	0.900	0.689	0.940	0.856
Mack15.2	0.843	0.775	0.783	0.507	0.850	0.667	0.934	0.831
Mack15.3	0.838	0.799	0.785	0.522	0.834	0.716	0.948	0.846
Mack15.4	0.862	0.840	0.773	0.661	0.927	0.782	0.957	0.852
Odd30	0.936	0.905	0.899	0.738	0.961	0.863	0.986	0.922
Even30	0.930	0.889	0.898	0.692	0.937	0.818	0.969	0.916
Mack30.A	0.933	0.892	0.900	0.686	0.954	0.816	0.980	0.915
Mack30.B	0.945	0.902	0.914	0.748	0.965	0.854	0.986	0.921
Williams30	0.971	0.925	0.955	0.782	0.979	0.880	0.986	0.944
Saxton30.A	0.932	0.891	0.890	0.702	0.957	0.842	0.977	0.914
Saxton30.B	0.948	0.903	0.921	0.726	0.958	0.841	0.987	0.923
60-item BNT	–	0.947	–	0.839	–	0.915	–	0.958