VR is an emergent technology that has attracted fervent attention in recent years due to the increased affordability and accessibility of the hardware and software.
With major corporations producing the equipment (Google, Oculus, and Samsung to name just a few), it’s a safe bet that VR will become more and more commonplace, and used more widely in the future.
One of the most interesting applications for VR is the use within psychological therapy. There are several advantages to this medium, with the ability to present environments that would otherwise be too costly or prohibitive becoming available within the virtual realm. We’ll go through why this matters below.
Mental illness is highly heterogeneous, both within and across diseases and individual symptomatology. While people rarely present exactly the same set of symptoms in the same way, at the same time, there are defining and typical characteristics of each defined illness that can be treated through standardized therapeutic programs.
VR can often be used as either an addition to these programs (and may even someday be presented as a standalone treatment). Phobias present a good case in how this can work, and how VR can enhance standardized therapy. Treatment is typically completed through graduated exposure, in which the fearful stimulus (a spider for example) is presented in steps .
The steps begin at an acceptable level of fear for the patient (this may begin by looking at a picture of a spider, or imagining a spider). The patient is provided with the time to relax around the fearful stimulus, and the fear will eventually subside. Escalating steps with increased exposure can ultimately lead to a more functional level of fear, in which the patient is no longer negatively affected to a level that impairs them.
For spider treatments, this will of course at some point require an actual spider. This might not be easy for the psychologist to reliably obtain, and for other phobias, the stimulus could be much more difficult to get hold of (a fear of flying for example could require going on a plane, which isn’t exactly convenient for a psychologist to oversee).
VR then offers the ability to present the stimulus in a much more accessible way – with enough immersion, all of the exposure steps can be done through the device .
But how can biometric methods help with this? Research can use biometric tools to record and measure fearful responses, and to see how they can be modulated in order to yield the most efficient treatment.
Research has shown how heart rate, facial muscles, electrodermal activity (GSR), respiration, and other aspects of physiology are reliably impacted by fearful responses . By quantifying these responses in a virtual environment, researchers can get a better idea of what elucidates fear, and which components are critical for successful treatment.
Clinicians can also use these measures within their work to provide objective data about the treatment trajectory, providing more evidence of effectiveness (or lack thereof). In a long-term perspective, patients may even be able to self-administer VR-based treatments, if biometric sensors are able to provide accurate enough data to the VR software about how to proceed with the treatment.
In a similar vein to phobia treatments, therapy for different anxieties is often carried out through exposure to the anxiety-provoking stimulus. Relaxation strategies might be taught to the patient so that they can learn how to better cope with an environment or setting [4, 5]. Repeated exposures ensure that they can practice how to be non-anxious in such situations.
Different scenarios can be entered by the patient, and the amount of anxiety-provoking elements can be increased or decreased in order to help the patient progress, providing a degree of flexibility to treatments.
Physiological responses to anxiety can also be used to inform treatment trajectory. Individuals with general anxiety disorder have been found to exhibit differences in their galvanic skin response, which could be used to provide information for judging therapy success .
Furthermore, eye tracking has been used to assess the efficacy of improvement in VR therapy for people with social anxiety. It was possible to see improvements in the participant’s anxiety levels (i.e. a reduction) through a quantification of the amount of social eye contact that the individuals exhibited in the VR simulation . This data could serve as a useful measure of progress in future VR social anxiety treatments.
Other disorders such as Post-Traumatic Stress Disorder (PTSD) have been examined in the context of VR treatment. PTSD involves flashbacks, nightmares, and anxiety of a certain event that was frightening (often, but not exclusively, caused by experiencing situations that most people will not encounter, such as a violent attack).
PTSD is often treated through the patient remembering the traumatic experience(s) in a safe environment, enabling the extinguishing of the strong emotional influence on the memory. A preliminary study examining the impact of therapy in VR with emergency workers who were at the Twin Towers on September 11th, 2001 found positive outcomes that remained at 6 months post-treatment . Other studies have also shown success with military veterans undergoing therapy in VR [9, 10].
Previous research has shown how patients with PTSD will attend more to “threatening” words (negatively valenced words that suggest a threat), as assessed by eye tracking . Heart rate and blood pressure have also been shown to differ in PTSD patients as compared to controls . All of this suggests a potential route to assess the severity of the disorder, and ways to understand how it can be treated and improved.
Addiction is another example of a disease that could benefit from the combined use of biometrics and VR-based therapy. The self-reported withdrawal symptoms and increased heart rate of Nicotine-dependent cigarette smokers have been found to be predicting of craving experiences in a VR environment. This study showed how real craving can be elicited in a VR environment, which can be important for future studies predicting who will respond well to addiction treatment [2, 13].
VR and Biofeedback
VR-based treatments of course aren’t just limited to mental illness. One study used EMG biofeedback in a VR environment for the treatment of children with cerebral palsy . The biofeedback provides information about the muscle movement, and allows the individual to adjust their muscle movements in response. The results showed that muscle imbalances could be improved through the treatment, and significantly more so with the use of feedback in VR.
This method also suggests a route for biofeedback to be incorporated into other VR treatments for mental illnesses. This could pave the way for VR therapy to be self-administered (rather than guided by a psychologist), opening up therapy for an increased number of people.
As VR technology, biometric sensors, and the software for each continue to improve, the capability and reach of VR based therapy will undoubtedly increase. This could well change the landscape of future psychological treatments, potentially making treatment both more accessible and more effective.
I hope you’ve enjoyed reading about how VR can be used alongside biometric methods in therapy. If you’d like to learn more about how biometric methods can be used to study human behavior, then download our free guide below.
 Opriş D., Pintea S., García-Palacios A., Botella C., Szamosközi S., David D. (2012). Virtual reality exposure therapy in anxiety disorders: A quantitative meta-analysis. Depress. Anxiety. 29:85–93. doi: 10.1002/da.20910. [PubMed] [Cross Ref]
 Maples-Keller J.L., Bunnell B.E., Kim S.J., Rothbaum B.O. (2017). The use of virtual reality technology in the treatment of anxiety and other psychiatric disorders. Harv. Rev. Psychiatry. 25:103–113. doi: 10.1097/HRP.0000000000000138. [PMC free article] [PubMed] [Cross Ref]
 Kreibig SD, Wilhelm FH, Roth WT, Gross JJ. (2007). Cardiovascular, electrodermal, and respiratory response patterns to fear- and sadness-inducing films. Psychophysiology. 44:787–806. doi: 10.1111/j.1469-8986.2007.00550.x. [PubMed] [Cross Ref]
 Eppley KR, Abrams AI, Shear J. (2006). Differential effects of relaxation techniques on trait anxiety: A meta-analysis. Journal of Clinical Psychology. 45(6):957–974. [PubMed]
 Borkovec TD, Costello E. (1993). Efficacy of applied relaxation and cognitive-behavioral therapy in the treatment of generalized anxiety disorder. J Consult Clin Psychol. 61:611–619. [PubMed]
 Thayer J.F., Friedman B.H., Borkovec T.D. (1996). Autonomic characteristics of generalized anxiety disorder and worry. Biological Psychiatry. 39(4):255–266. http://dx.doi.org/10.1016/0006-3223(95)00136-0 [PubMed]
 Grillon, H., Riquier, F., Herbelin, B., Thalmann, D. (2006). Use of virtual reality as therapeutic tool for behavioural exposure in the ambit of social anxiety disorder treatment. Proc. 6th Intl Conf. Disability, Virtual Reality & Assoc. Tech., ICDVRAT/University of Reading, UK; ISBN 0704998653.
 Difede J., Cukor J., Jayasinghe N., Patt I., Jedel S., Spielman L., … Hoffman H. G. (2007). Virtual Reality exposure therapy for the treatment of posttraumatic stress disorder following September 11, 2001. The Journal of Clinical Psychiatry, 68, 1639–1647. [PubMed]
 Reger G. M., Holloway K. M., Rothbaum B. O., Difede J., Rizzo A. A., & Gahm G. A. (2011). Effectiveness of virtual reality exposure therapy for active duty soldiers in a military mental health clinic. Journal of Traumatic Stress, 24(1), 93–96. doi:10.1002/jts.20574 [PubMed] [Cross Ref]
 Rizzo A., Difede J., Rothbaum B. O., Reger G., Spitalnick J., Cukor J., & Mclay R. (2010). Development and early evaluation of the Virtual Iraq/Afghanistan exposure therapy system for combat-related PTSD. Annals of the New York Academy of Sciences (NYAS), 1208, 114–125. doi:10.1111/j.1749-6632.2010.05755.x [PubMed] [Cross Ref]
 Bryant R. A., Harvey A. G., Gordon E., & Barry R. J. (1995, December). Eye movement and electrodermal responses to threat stimuli in post-traumatic stress disorder. International Journal of Psychophysiology: Official Journal of the International Organization of Psychophysiology, 20(3), 209–213. [PubMed]
 McFall ME, Veith RC, Murburg MM. (1992). Basal sympathoadrenal function in posttraumatic distress disorder. Biol Psychiatry. 31:1050–6. [PubMed]
 Thompson-Lake DGY, Cooper KN, Mahoney JJ, et al. Withdrawal symptoms and nicotine dependence severity predict virtual reality craving in cigarette-deprived smokers. Nicotine Tob Res. 2015;17:796–802. [PMC free article] [PubMed]
 Yoo JW, Lee DR, Sim YJ, You JH, Kim CJ. Effects of innovative virtual reality game and EMG biofeedback on neuromotor control in cerebral palsy. Biomed Mater Eng. 2014;24(6):3613–8. doi: 10.3233/BME-141188. [PubMed] [Cross Ref]