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Using contextual conditional preferences for recommendation tasks: a case study in the movie domain

Karpus A., Di Noia T., Tomeo P., Goczyła K.

Studia Informatica

2016

Vol. 37, nr 1

7--18

Recommendation engines aim to propose users items they are interested in by looking at the user interaction with a system. However, individual interests may be drastically influenced by the context in which decisions are taken. We present an attempt to model user interests via a set of contextual conditional preferences. We show that usage of proposed preferences gives reasonable values of the accuracy and the precision even when the dataset is quite small.

Systemy rekomendacyjne sugerują użytkownikom produkty, którymi mogą być zainteresowani, na podstawie wcześniejszej interakcji z systemem. Jednak duży wpływ na decyzję użytkownika ma kontekst, w którym jest ona podejmowana. W artykule zaproponowano model zainteresowań użytkownika jako zbiór kontekstowych preferencji warunkowych i pokazano, że z ich wykorzystaniem można uzyskać dużą dokładność i precyzję rekomendacji, nawet dla małych zbiorów danych.

An Attempt to Adapt a Logic of Conditional Preferences for Reasoning with Contrary-To-Duties

Cholvy L., Garion Ch.

Fundamenta Informaticae

2001

Vol. 48, nr 2,3

183-204

This paper presents an attempt to adapt, in the context of deontic reasoning, a logic defined by Boutilier for reasoning with conditional preferences. The first motivation for this work is that deontic logic can be given a semantics in terms of ordered worlds like in this kind of logic: the preference relation among worlds aims at ordering worlds from the most ideal ones to the least ideal ones. The second motivation is that Boutilier introduced a model of an agent's ability by distinguishing between controllable, influenceable and uninfluenceable propositions. And we noticed that this partition can be related to the notions introduced by Carmo and Jones for reasoning with Contrary-To-Duties. This present work shows an extension of Boutilier's work in order to use his logic for reasoning with Contrary-To-Duties. An exhaustive study of a benchmark example of CTDs leads us to show that the results obtained with this extension coincide exactly with those obtained by Carmo and Jones.