Simone Balloccu


Comparing informativeness of an NLG chatbot vs graphical app in diet-information domain
Simone Balloccu | Ehud Reiter
Proceedings of the 15th International Conference on Natural Language Generation

Towards In-Context Non-Expert Evaluation of Reflection Generation for Counselling Conversations
Zixiu Wu | Simone Balloccu | Rim Helaoui | Diego Reforgiato Recupero | Daniele Riboni
Proceedings of the 2nd Workshop on Natural Language Generation, Evaluation, and Metrics (GEM)

Reflection is an essential counselling strategy, where the therapist listens actively and responds with their own interpretation of the client’s words. Recent work leveraged pre-trained language models (PLMs) to approach reflection generation as a promising tool to aid counsellor training. However, those studies used limited dialogue context for modelling and simplistic error analysis for human evaluation. In this work, we take the first step towards addressing those limitations. First, we fine-tune PLMs on longer dialogue contexts for reflection generation. Then, we collect free-text error descriptions from non-experts about generated reflections, identify common patterns among them, and accordingly establish discrete error categories using thematic analysis. Based on this scheme, we plan for future work a mass non-expert error annotation phase for generated reflections followed by an expert-based validation phase, namely “whether a coherent and consistent response is a good reflection”.

Beyond calories: evaluating how tailored communication reduces emotional load in diet-coaching
Simone Balloccu | Ehud Reiter
Proceedings of the 2nd Workshop on Human Evaluation of NLP Systems (HumEval)

Dieting is a behaviour change task that is difficult for many people to conduct successfully. This is due to many factors, including stress and cost. Mobile applications offer an alternative to traditional coaching. However, previous work on apps evaluation only focused on dietary outcomes, ignoring users’ emotional state despite its influence on eating habits. In this work, we introduce a novel evaluation of the effects that tailored communication can have on the emotional load of dieting. We implement this by augmenting a traditional diet-app with affective NLG, text-tailoring and persuasive communication techniques. We then run a short 2-weeks experiment and check dietary outcomes, user feedback of produced text and, most importantly, its impact on emotional state, through PANAS questionnaire. Results show that tailored communication significantly improved users’ emotional state, compared to an app-only control group.


How are you? Introducing stress-based text tailoring
Simone Balloccu | Ehud Reiter | Alexandra Johnstone | Claire Fyfe
Proceedings of the Workshop on Intelligent Information Processing and Natural Language Generation