A Novel Nonadditive Collaborative-Filtering Approach Using Multicriteria Ratings

Table 1

𝑣𝐹_𝛽 of different methods.

Classification method	β
	1	1/2	1/3	1/4	1/5	1/6	1/7	1/8
Single-criterion rating	0.545	0.676	0.735	0.762	0.776	0.784	0.789	0.793
Average similarity	0.546	0.681	0.742	0.770	0.785	0.794	0.799	0.803
Worst-case similarity	0.536	0.671	0.733	0.762	0.777	0.785	0.791	0.795
Manhattan distance	0.563	0.707	0.773	0.803	0.820	0.829	0.835	0.839
Euclidean distance	0.553	0.691	0.753	0.782	0.797	0.806	0.812	0.815
Chebyshev distance	0.553	0.688	0.749	0.777	0.792	0.801	0.806	0.810
WAM	0.569	0.682	0.735	0.756	0.769	0.793	0.789	0.792
Non-additive approach	0.657	0.719	0.751	0.779	0.797	0.822	0.837	0.851