Responsible Link-Recommendations in Dynamic Environments

Descrizione del progetto

Comprendere l’impatto delle raccomandazioni di collegamenti sulle dinamiche sociali

Comprendere l’influenza degli algoritmi sul comportamento umano nei social media online è fondamentale. Gli algoritmi di raccomandazione dei collegamenti, che suggeriscono nuove connessioni agli utenti, sono pervasivi e modellano fondamentalmente il modo in cui vengono create le nuove connessioni e le informazioni che gli utenti incontrano. Per governare efficacemente i social network online è necessario comprendere a fondo gli effetti di questi algoritmi e adattarli per ottenere vantaggi a lungo termine. In questo contesto, il progetto RE-LINK, finanziato dal CER, intende sviluppare nuovi modelli computazionali per comprendere l’impatto delle raccomandazioni di collegamenti sulle dinamiche sociali. Il progetto prevede l’elaborazione di un nuovo paradigma di raccomandatore di collegamenti volto a promuovere comportamenti sociali positivi, bilanciando le prestazioni a breve termine con i benefici sociali a lungo termine. La valutazione degli algoritmi sarà condotta attraverso simulazioni multi-agente su larga scala, esperimenti online e analisi di dati reali.

Obiettivo

This proposal aims to develop, for the first time, new computational models to systematically evaluate 1) the long-term societal impacts of link-recommendation algorithms in online social networks and 2) design a new paradigm of link-recommenders that incentivize cooperation, collective action, and misinformation control.

It is urgent to understand how algorithms used in online social media impact human behavioural dynamics given the widespread use of social media platforms and the evidence that they contribute to exacerbate radicalization, misinformation, and incite hate. This is a challenging endeavour. Online platforms are nowadays complex ecosystems where millions of humans influence each other while co-existing with AI algorithms. In this context, link-recommendation algorithms, used to recommend new connections to users, are ubiquitous. Such algorithms fundamentally affect how new connections are formed and the information users are exposed to. Governing online social networks requires understanding the impact of link-recommenders and how to adapt them to ensure long-term benefits.

With RE-LINK, I aim to develop a new class of models to understand the impact of link-recommendations on social dynamics and, in turn, design a new paradigm of algorithms that balance short-term performance and long-term societal benefits. This will be achieved by developing agent-based models where the evolution of behaviours occurs over adaptive networks whose growth, in turn, follows the heuristics used by link-recommenders. I will resort to evolutionary game theory and stochastic population dynamics to formally study the stability of behaviours in this setting. I will use the modelling results to design new link-recommenders that contribute to stabilize positive social behaviours such as cooperation, collective action, and misinformation debunking. The developed algorithms will be evaluated with large-scale multi-agent simulations, online experiments, and real-world data.