A GNN Model with Adaptive Weights for Session-Based Recommendation Systems

TL;DR

This paper introduces an adaptive weighting mechanism for GNN-based session recommendation models, improving prediction accuracy and addressing cold start issues by dynamically adjusting item importance within sessions.

Contribution

It proposes a novel adaptive weighting strategy for GNN vectors in session-based recommendation systems, enhancing existing models like SR-GNN with better accuracy and cold start handling.

Findings

Improved recommendation accuracy on Dressipi dataset

Effective handling of cold start scenarios

Enhanced user experience in real-world applications

Abstract

Session-based recommendation systems aim to model users' interests based on their sequential interactions to predict the next item in an ongoing session. In this work, we present a novel approach that can be used in session-based recommendations (SBRs). Our goal is to enhance the prediction accuracy of an existing session-based recommendation model, the SR-GNN model, by introducing an adaptive weighting mechanism applied to the graph neural network (GNN) vectors. This mechanism is designed to incorporate various types of side information obtained through different methods during the study. Items are assigned varying degrees of importance within each session as a result of the weighting mechanism. We hypothesize that this adaptive weighting strategy will contribute to more accurate predictions and thus improve the overall performance of SBRs in different scenarios. The adaptive weighting strategy can be utilized to address the cold start problem in SBRs by dynamically adjusting the importance of items in each session, thus providing better recommendations in cold start situations, such as for new users or newly added items. Our experimental evaluations on the Dressipi dataset demonstrate the effectiveness of the proposed approach compared to traditional models in enhancing the user experience and highlighting its potential to optimize the recommendation results in real-world applications.