Therapy Progress Indicator (TPI): Combining speech parameters and the subjective unit of distress

Broek van den, Egon L. and Sluis van der, Frans and Dijkstra, Ton (2009) Therapy Progress Indicator (TPI): Combining speech parameters and the subjective unit of distress. In: 3rd International Conference on Affective Computing and Intelligent Interaction and Workshops, ACII 2009, 10-12 Sept. 2009, Amsterdam, The Netherlands.

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Abstract:	A posttraumatic stress disorder (PTSD) is a severe handicap in daily life and its treatment is complex. To evaluate the success of treatments, an objective and unobtrusive expert system was envisioned: an therapy progress indicator (TPI). Speech was considered as an excellent candidate for providing an objective, unobtrusive emotion measure. Speech of 26 PTSD patients was recorded while they participated in two reliving sessions: re-experiencing their last panic attack and their last joyful occasion. As a subjective measure, the subjective unit of distress was determined, which enabled the validation of derived speech features. A set of parameters of the speech features: signal, power, zero crossing ratio, and pitch, was found to discriminate between the two sessions. A regression model involving these parameters was able to distinguish between positive and negative distress. This model lays the foundation for an TPI for patients with PTSD, which enables objective and unobtrusive evaluations of therapies.
Item Type:	Conference or Workshop Item
Copyright:	© 2009 IEEE
Faculty:	Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:	Human Media Interaction (HMI)
Link to this item:	http://purl.utwente.nl/publications/69481
Official URL:	http://dx.doi.org/10.1109/ACII.2009.5349554
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