Using immersive virtual reality to help patients with persecutory delusions successfully re-engage with social situations.

John Grace QC PhD Scholarship 2017:  Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford.

Supervisor: Professor Daniel Freeman

Summary:

Paranoia is when an individual incorrectly thinks that others are out to harm them. Many people have a few paranoid thoughts, a few have many. The severest form is persecutory delusions, when the belief in the thoughts is very strong and distressing. Severe paranoia leads to individuals finding it very difficult to be around other people and therefore withdrawing from social contact. The purpose of the DPhil is to identify the best psychological techniques to help people go back into social situations. Experimental studies will test the effectiveness of five techniques (enhancing self-confidence; developing a compassionate approach to the self; using positive imagery; switching attentional focus away from threat; dropping the use of countermeasures that maintain threat beliefs) for individuals with paranoid thoughts when they go into identical social situations presented using the latest virtual reality technology. The most effective technique will then be tested in patients with persecutory delusions in the context of schizophrenia. This methodological approach will enable recommendations to be given to patients about how to reengage with social situations.

Research Student: Poppy Brown

Poppy completed her undergraduate degree in Psychology and Philosophy at Corpus Christi College, Oxford. She is committed to conducting research into mental health. She published a policy paper on student mental health on behalf of the Higher Education Policy Institute in September 2016 and her final year research project investigated self-criticism in Social Anxiety Disorder. She enjoys volunteering for a number of charities including Oxfordshire Mind and Schools Plus.

Start Date: September 2017

Scientific Goal:


The scientific goal is to identify the most helpful psychological strategies for patients with persecutory delusions to be less paranoid and more meaningfully engaged in everyday social situations.


Progress Report 2018

 

Psychosis is characterised by a collection of different experiences, most commonly including paranoia (unfounded ideas that other people intend you harm) and hallucinations (sensory experiences in the absence of the relevant external stimulus). Treatments for psychosis are limited both in efficacy and accessibility. My research aims to help solve this problem by combining a three pronged approach.

Firstly,my focus is specifically on the individual experience of paranoia rather than ‘psychosis’ as a whole, as this enables a far richer understanding of the experience itself. Secondly, I am predominantly conducting manipulation studies that allow for causal conclusions to be drawn about the factors that cause and maintain paranoia, rather than using study designs that yield only correlational data. Finally, I am using virtual reality (VR) technology, as this allows me to expose individuals experiencing paranoia to social situations in a controlled setting where they can practice techniques to overcome their fears.

My research began by conducting a systematic review of the literature in order to identify all studies that used some sort of manipulation of a psychological mechanism and measured the effect of this manipulation on the experience of delusions or hallucinations. It is this type of study that allows causal, rather than correlational, inferences to be made. I found only 41 such studies, predominantly looking at mechanisms such as self-confidence, attention biases, sleep, worry, and negative affect. An area that seemed to have not have received much attention was compassion.

Feeling that the self is vulnerable and holding core beliefs that other people are inherently hostile and dangerous are two things that are thought to lie at the heart of paranoia. It seems feasible that increasing compassion for the self would help to reduce feelings of vulnerability, and increasing compassion felt towards other people would help increase the flexibility of core beliefs concerning other people as hostile and threatening, thus reducing paranoia. These two hypothesis are what my first two studies aim to test.

I have just completed testing on 100 individuals from the general population reporting paranoid thoughts who were randomised to complete guided imagery that either aimed to increase self-compassion or that was entirely neutral in affect. The self-compassion imagery task involved creating a ‘compassionate coach’, an ideal image unique to each individual that embodies all the components of compassion and confidence and who can provide support in difficult situations. Individuals then practised using their compassionate coach in virtual reality situations, and we assessed their level of mistrust towards the VR avatars. Analysis on the results is currently underway.

A second study will use a similar design but instead use elements of Loving Kindness Mediation in order to foster compassion felt for other people, rather than the self. The imagery exercise will likewise be practised in VR social situations and be compared to a neutral imagery condition, in order to measure the effect of the intervention on paranoia.

In the future I will conduct another study using a third different kind of psychological intervention and measure its effect on levels of paranoia experienced in VR. I will then also conduct a clinical trial on whichever VR intervention is found to be most successful in order to see the whether it is similarly effective on the clinical population experiencing more severe paranoia.

Meanwhile I am collecting cross-sectional data from the general population that will enable analysis of the associations between the experience of paranoia, compassion for the self, compassion for others, and feelings of vulnerability and safety. Alongside this I am doing some analysis on a large existing dataset on whether certain aspects of parenting e.g. levels of care protectiveness are associated with paranoia. Both feelings of vulnerability and beliefs about the world as hostile may stem from certain aspects of parenting but this, to our knowledge, has not previously been looked into.