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Table 4 MAE comparison among various active sampling heuristics in PMF (A smaller MAE means a better performance)

From: An online-updating algorithm on probabilistic matrix factorization with active learning for task recommendation in crowdsourcing systems

  PMF with active sampling heuristics
No. of selected samples T[N]W[Reli]+ T[MaxDiff]W[Reli] (ActivePMFv1) T[N]W[Reli]+ T[MaxPredictErr]W[Reli] T[N]W[Reli]+ T[MaxEntropy]W[Reli]
1000 0.3658 0.3658 0.3658
2000 0.2778 0.2778 0.2778
3000 0.1955 0.1955 0.1955
4000 0.1473 0.1443 0.1482
5000 0.1151 0.1184 0.1262
6000 0.0977 0.0977 0.1100
7000 0.0945 0.0839 0.0963
8000 0.0899 0.0664 0.0809
9000 0.0652 0.0479 0.0536
10000 0.0334 0.0340 0.0366
11000 0.0176 0.0221 0.0237