New therapies against excessive weight: A collaborative project led by the University of Würzburg develops virtual reality methods to positively affect the body perception of obese patients.
People struggling with obesity are often at war with their own bodies. A lot of them have stopped believing that they are able to lose weight at all. This state of discontentment can also have an impact on the social life and the mental health of sufferers. These are good reasons to search for new therapeutic options. Professors Marc Erich Latoschik and Carolin Wienrich at Julius-Maximilians-Universität (JMU) Würzburg in Bavaria, Germany, are doing exactly that.
Virtual reality and augmented reality (VR/AR) visualisation techniques can be used for obese patients.
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They have joined forces with Professor Mario Botsch from the University of Bielefeld and with research teams from TU Munich, HTW Berlin, Gera University of Applied Sciences and the two companies, brainboost GmbH and The Captury GmbH.
Latoschik who heads the JMU Chair for Human-Computer Interaction says: "So far, therapeutic approaches have focused on dietary regimes, lifestyle changes or bariatric surgery to reduce the size of the stomach. The psychological causes and consequences are often neglected."
"In a first step, we want patients to get a realistic image of their own body, not one that is externally influenced and judgemental," Wienrich explains. "To achieve this, we create an exact virtual replica of a person, a so-called avatar."
To make this avatar as realistic as possible, patients are photographed by 120 cameras from different angles. Based on these images, the team from the University of Bielefeld composes a life-like replica of the body which patients can subsequently control in the virtual space.
Being confronted with one's own body in the virtual world can be strange at first - and also evoke negative feelings. "You have to get outside your comfort zone and learn to accept the virtual avatar as your own body," Wienrich says. "Once patients have got used to this, they can tap into the possibilities of the virtual environment. For example, we can create situations that can help patients break out of vicious circles in the real world."
"This confrontation, which also involves uncomfortable situations in the virtual world, is an established method in psychology," Latoschik explains. "Here in Würzburg, also the clinical Psychology researches virtual worlds to treat phobias, such as arachnophobia, through personalised simulator training.
Once the patients' avatars have been brought to life in the virtual world, different therapeutic approaches can be implemented, including the possibility to customise the avatar. This enables patients to reflect on past events, such as gradually gaining weight over many years. But it also allows visualising the results of successful therapy.
"If we change the appearance or behaviour of the avatar, this can have measurable consequences for the real person," says Latoschik. For example, the technique could be used to visualise what goes on inside the body to demonstrate how excessive weight gain affects internal organs - and which positive outcomes therapy can have.
"It is impossible for most of us to imagine what we will look like in 20 or 30 years' time. Fast-forwarding time in virtual reality reveals completely new insights about ourselves and the potential consequences of our actions," the professor explains.
The JMU team wants to combine fundamental research with approaches capable of being implemented in practice. "Research based on virtual environments is an established method in the scientific and corporate world," the professor explains. "We combine tried and tested aspects with new technical possibilities and scientific questions."
The ViTraS project combines elements of interactive computer graphics, cognitive research and computer science. It also includes gamification which refers to the application of typical elements from computer games. "We are mainly interested in questions of game mechanics and participant motivation. This makes the project interesting for students as well," says Latoschik. Students with a matching field of study can participate in scientific work as research assistants or interns.