Response-inhibition training for compulsive acquiring in hoarding disorder

Lucinda Gledhill is a Trainee Clinical Psychologist at King's College London and she is currently conducting a research study at the Centre for Anxiety Disorders and Trauma (at the Maudsely Hospital in London). She is investigating the effectiveness of a new online intervention for compulsive acquisition in people who struggle with Hoarding Disorder.

She would like to invite you to take part in a study that is being conducted as part of the research component of the Doctorate in Clinical Psychology programme. Before you decide if you would like to participate, please read the information below and the attached Information Sheet. If there is anything that isn’t clear, please do not hesitate to contact Lucinda on the details found at the end of this document. 

What is the purpose of the study?

The aim of this study is to test out a training programme for adults with hoarding disorder who struggle with compulsive acquisition (collecting, buying) of objects. Once the study is complete, we will ask for feedback on how people found it and we hope to use this feedback to help improve and develop the training programme further.

What will happen to me if I take part?

Telephone assessment:

If you decide to take part, you will be contacted by a member of the research team. They will arrange a telephone call with you to ask you questions about your experience of hoarding, and your mood. This will help us to check your eligibility criteria to participate in this study. If you meet criteria, we will also show you images of objects and ask you to rate them for likeability. This will help us to tailor the training programme to your specific presentation. After this, you will be asked to wait either 4, 8, or 12 days before starting the programme. To help us decide on the interval between when you start the programme, we will follow a similar format to drawing names out of a hat.

Where does the study take place?

Apart from the initial telephone call and an optional feedback call at the end of the study, the study is completed online via a desktop computer or laptop. You can access the programme wherever you wish, using your own Internet at home, or in any area convenient to you that has computer facilities and Internet access, for example a library or internet cafe. However, we do recommend a quiet place where you can concentrate.

Training part 1

In part 1 of the training, you will be asked to log in and complete the programme for approximately 10 minutes every day for four days, as well as the daily ratings mentioned above. Following this you will be asked to wait a further 4, 8 or 12 days, before starting the second part of the training.

Training part 2

In part 2 of the training you will again be asked to log in and complete the programme for approximately 10 minutes every day for four days, as well as the daily ratings mentioned above.

What else do I have to do?

Throughout all parts of the study we will ask you to complete daily ratings of your mood, and your thoughts about acquiring objects, which will take 5 minutes each day. We will send you daily text reminders to help with this. We will ask you to complete a set of questionnaires at four time-points: before the study begins, at the start of part 1, at the start of part 2, and one month after the study is completed. These will all be completed online, and links to these will be sent to you via email.

How long will I be taking part for?

Depending on the length of time you wait to start the programme and between part 1 and 2, the longest amount of time you will be actively involved in this study will be 32 days, while the minimum will be 16 days.

What will happen to the results of the study?

The results from this study will be used to modify the programme. Further research will then be conducted with other groups of people with similar difficulties. Depending on your preference, a final report summarising the main findings will be sent to you. These research findings will also be disseminated through publication in a peer reviewed scientific journal and at academic conferences. You will not be identifiable in any report or publication arising from this research.

Who should I contact for further information?

If you have any questions or require more information about this study, please contact me using the following contact details:

Lucinda Gledhill

Address: Department of Psychology | Institute of Psychiatry, Psychology & Neuroscience | King’s College London | Addiction Sciences Building | 4 Windsor Walk | London | SE5 8AF | Email:

Please read the attached Information Sheet to learn more about this project.