Blended Recommending

The concept of Blended Recommending combines advantages of conventional automated recommender systems, e.g. low user effort and high accuracy, with those of interactive information filtering, e.g. high level of control and transparency. For this, faceted filtering, an intuitive and efficient means for browsing large items spaces, is integrated with different recommender techniques in a hybrid fashion.

MyMovieMixer and HotelGuide are two examples for interactive recommender systems that demonstrate the approach: Users can select criteria from a set of filter facets which then serve as input for different recommender methods, both collaborative and content-based filtering. In addition, users can weight the criteria to express their preferences and to exert control over the hybrid recommendation process.

Related research topics


Benedikt Loepp



  • Katja Herrmanny
  • Jan Feuerbach


Enhancing an Interactive Recommendation System with Review-based Information Filtering

Feuerbach, J., Loepp, B., Barbu, C.-M., & Ziegler, J. (2017). In P. Brusilovsky, M. de Gemmis, A. Felfernig, P. Lops, J. O’Donovan, N. Tintarev, & C. M. Willemsen (Eds.), IntRS 2017: Interfaces and Human Decision Making for Recommender Systems : Proceedings of the 4th Joint Workshop on Interfaces and Human Decision Making for Recommender Systems co-located with ACM Conference on Recommender Systems (RecSys 2017) (Vol. 1884, pp. 2–9).

Merging interactive information filtering and recommender algorithms: model and concept demonstrator

Loepp, B., Herrmanny, K., & Ziegler, J. (2015). In i-com (Vol. 14, pp. 5–17).

Blended Recommending: Integrating Interactive Information Filtering and Algorithmic Recommender Techniques

Loepp, B., Herrmanny, K., & Ziegler, J. (2015). In Proceedings of the 33rd International Conference on Human Factors in Computing Systems (CHI ’15) (pp. 975–984). New York, NY, USA: ACM.

MyMovieMixer: Ein hybrider Recommender mit visuellem Bedienkonzept

Herrmanny, K., Schering, S., Berger, R., Loepp, B., Günter, T., Hussein, T., & Ziegler, J. (2014). In Mensch und Computer 2014 – Tagungsband (pp. 45–54). Berlin: De Gruyter Oldenbourg.