Tobias Hallmen M.Sc.
| Phone: | +49 821 598 2322 |
| Fax: | +49 821 598 2349 |
| Email: | tobias.hallmen@uni-auni-a.de () |
| Room: | 2016 (N) |
| Open hours: | Upon Request |
| Address: | Universitätsstraße 6a, 86159 Augsburg |
Research Interests
I carry out multimodal (audio, video, text) conversation analyses using methods from the field of machine learning and artificial intelligence (AI). I am investigating whether and how these methods can be used to evaluate and assess different conversational situations.
The conversations take place in the context of psychotherapy sessions (TherapAI project), human medicine and teacher training (KodiLL project). The aim is to find correlations and use them to make the quality of these conversations measurable and (automatically) assessable, as well as to improve them in the long term. This benefits both sides - the therapists/medical practitioners/teachers and the patients/parents.
For example, it is conceivable that the characteristics found could be used to intervene in therapies, or that AI-supported feedback and recommendations for action could be given to students during training in order to conduct better conversations in the future.
Final Theses
Here are topics that I envision as my final thesis. Ideally, the results will be implemented as a module for Nova - this makes it easy to reuse and to correlate and evaluate the different characteristics on existing data sets. You are also welcome to contribute your own thematically appropriate suggestions:
- Speaker diarisation: Often there are no audio recordings separated by speaker, or if there are, you can also hear the other speakers (quieter) in your own recording. This distorts the assignment of audio-based features, e.g. transcription or emotion recognition.
- Existing methods use purely audio here - it would be conceivable to supplement this modality with video or text or other derived features (points of view) and thus improve speaker classification.
- Reception signals: While someone is speaking, listeners usually give reception signals (yes, mhm, head nod, etc.). These are indications of whether and to what extent someone is involved in the conversation. Existing methods need to be implemented, improved and evaluated.
- Remote photoplethysmography: Usually the filmed persons do not wear sensors, but some values would still be interesting, e.g. the “cuff-free blood pressure measurement” via video to determine heart rate and variability. These can be signs of excitement in the conversation and useful for evaluations.
- Language models as experts: Can (small) language models relieve people of time-consuming annotation and evaluation work, or at least support them? Due to sensitive data, these models must be executable locally, at best on end-user hardware.
- Language models as training partners: Language models are often used for synthetic data generation. Can they also be used (locally) as a useful training partner for practicing parental conversations at different levels of difficulty?