Comparison of different methods.

<p>Results are obtained by 10-fold cross-validation experiments on MovieLens (5,000 users and 5,977 objects) with cosine similarity measure. * and *** denotes the method in the corresponding row is better than that in the corresponding column at the statistical significance level of 10⁻¹ and 10⁻⁸ after the Bonferroni correction, respectively.+denotes the null-hypothesis cannot be rejected at the significance level of 10⁻¹ after the Bonferroni correction. Restart probabilities for random walk approaches are set to 0.9. Parameters are set to <i>ß</i> = 10 for RWPL, <i>λ</i> = 0.04 for RWNN, <i>δ</i> = 0.17 for RWTF, <i>ß</i> = 10 for USPL, <i>λ</i> = 0.03 for USNN and <i>δ</i> = 0.20 for USTF to obtain the highest performance.</p><p>Comparison of different methods.