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TY - JOUR TI - A dual hybrid recommender system based on SCoR and the random forest AU - Panagiotakis Costas AU - Papadakis Harris AU - Fragopoulou Paraskevi JN - Computer Science and Information Systems PY - 2021 VL - 18 IS - 1 SP - 115 EP - 128 PT- Article AB- We propose a Dual Hybrid Recommender System based on SCoR, the Synthetic Coordinate Recommendation system, and the Random Forest method. By combining user ratings and user/item features, SCoR is initially employed to provide a recommendation which is fed into the Random Forest. The two systems are initially combined by splitting the training set into two “equivalent” parts, one of which is used to train SCoR while the other is used to train the Random Forest. This initial approach does not exhibit good performance due to reduced training. The resulted drawback is alleviated by the proposed dual training system which, using an innovative splitting method, exploits the entire training set for SCoR and the Random Forest, resulting to two recommender systems that are subsequently efficiently combined. Experimental results demonstrate the high performance of the proposed system on the Movielens datasets.