Two Experimental Virtual Paradigms for Stress Research: Developing Avatar-Based Approaches for Interpersonal and Evaluative Stressors

Real sweating in a virtual stress environment: Investigation of the stress reactivity in people with primary focal hyperhidrosis

Background

Hyperhidrosis (excessive sweating, OMIM %114110) is a complex disorder with multifactorial causes. Emotional strains and social stress increase symptoms and lead to a vicious circle. Previously, we showed significantly higher depression scores, and normal cortisol awakening responses in patients with primary focal hyperhidrosis (PFH). Stress reactivity in response to a (virtual) Trier Social Stress Test (TSST-VR) has not been studied so far. Therefore, we measured sweat secretion, salivary cortisol and alpha amylase (sAA) concentrations, and subjective stress ratings in affected and non-affected subjects in response to a TSST-VR.

Method

In this pilot study, we conducted TSST-VRs and performed general linear models with repeated measurements for salivary cortisol and sAA levels, heart rate, axillary sweat and subjective stress ratings for two groups (diagnosed PFH (n = 11), healthy controls (n = 16)).

Results

PFH patients showed significantly heightened sweat secretion over time compared to controls (p = 0.006), with highest quantities during the TSST-VR. In both groups, sweating (p < 0.001), maximum cortisol levels (p = 0.002), feelings of stress (p < 0.001), and heart rate (p < 0.001) but not sAA (p = 0.068) increased significantly in response to the TSST-VR. However, no differences were detected in subjective ratings, cortisol concentrations and heart rate between PFH patients and controls (p_all > 0.131).

Conclusion

Patients with diagnosed PFH showed stress-induced higher sweat secretion compared to healthy controls but did not differ in the stress reactivity with regard to endocrine or subjective markers. This pilot study is in need of replication to elucidate the role of the sympathetic nervous system as a potential pathway involved in the stress-induced emotional sweating of PFH patients.

[Using new media in pediatric psychosomatic medicine]

Neue Medien wie Smartphone-Apps oder virtuelle Realitäten (VR) finden zunehmend Anwendung in der pädiatrischen Psychosomatik. In der Diagnostik liegen die Vorteile in der Erfassung von Daten im Alltag sowie in der realitätsnahen und zugleich standardisierten Erfassung mithilfe der VR. In der Behandlung lassen sich selbstadministrierte und hybride Technologien von computerassistierten und computerspielbasierten Interventionen unterscheiden, die allesamt zunehmend in der pädiatrischen Psychosomatik zum Einsatz kommen, so z. B. bei Schmerzerkrankungen, Enkopresis, chronischen Erkrankungen oder auch begleitenden Depressionen und Ängsten. Durch das Auslösen alltagsnaher Reaktionen bei gleichzeitiger maximaler Kontrolle bieten VR auch in der Forschung große Vorteile. Nichtsdestotrotz sind Kontraindikationen wie Psychosen, Epilepsie und Migräne zu beachten. Eine umfassende Schulung des Fachpersonals ist daher für die Nutzung neuer Medien in der Diagnostik, Behandlung und Forschung essenziell.

Virtual social support buffers stress response: An experimental comparison of real-life and virtual support prior to a social stressor

BACKGROUND AND OBJECTIVES

Face-to-face and text-based social support have been shown to attenuate stress responses in past studies. Yet as social interactions increasingly take place online by means of virtual humans, our objective was to examine whether different forms of social support (virtual vs. real) prior to the Trier Social Stress Test (TSST) would also decrease stress. Additionally, the effect on subsequent real-life social behaviors (helping and approach) was evaluated while controlling for affective states and social presence.

METHODS

56 participants were either supported by an avatar, an agent, a real human or received no support before completing the TSST and two subsequent social behavior tasks (pen task and seating task).

RESULTS

Results show no difference in agency regarding social presence. Yet, participants with agent support and no support had significantly higher heart rates during the TSST and reported to be more worried. Also, they were more irritated and showed significantly slower helping reactions (picking up pens).

LIMITATIONS

A limitation to this study is that only emotional verbal and non-verbal support were provided by a stranger. Different forms of support as well as a different source (i.e., a friend) may have a more pronounced effect on stress buffering.

CONCLUSIONS

Virtual social support is as effective as face-to-face support in terms of stress buffering, as long as the recipient has the impression that it is provided by another human (via an avatar). This has wide ranging implications not only for health-related application in prevention and treatment but also for further research.