Table 2.

Pairwise discriminant matrix.

Item	C	GF	BOP	OF
C	1.00	2.00	2.00	3.00
GF	0.50	1.00	2.00	2.00
BOP	0.50	0.50	1.00	2.00
OF	0.33	0.33	0.50	1.00