Exploring the relationship between dopamine, ownership and reward

Take part in our study to explore the relationship between dopamine, ownership and reward.

Study dates

  • Study opened in May 2021.
  • The study will remain open until we have the required amount of data needed. 

About the study

Our studies explore the relationship between dopamine, ownership and reward. We will measure your dopamine level by taking a sample of your tears.

What the study involves

The study takes 45 minutes.

We use the Schirmer’s Test Protocol 1, which is usually used to diagnose dry eyes. This protocol involves the placement of a thin strip of filter paper within the lower eyelid for a few minutes, to absorb tear fluid. This test may be mildly uncomfortable for some participants. In our studies, this is often followed by a computer task, which involves sorting items on the basis of a colour cue.

Compensation for your time

Participants can be compensated in: 

  • £10 shopping vouchers, or
  • £10 cash, or
  • Experimental Hours Credit (for Psychology Students).

Eligibility

You can take part if you are:

  • Aged between 18 years and 35 years old.
  • Have normal or corrected-to-normal (i.e. wear glasses) visual acuity.
  • Have normal colour vision.
  • Have no history of eye health problems including dry eye disease.  
  • Be a native English speaker or have equivalent fluency.
  • Have been resident in the UK for at least 2 years.
  • Not be taking any medication prescribed for a diagnosed mental health or neurological condition.
  • Not be a daily user of any recreational substances (e.g., nicotine, alcohol, cannabis).
  • Have refrained from taking caffeine or any recreational substances (e.g., nicotine, alcohol, cannabis) for at least 24 hours before your allotted testing session.
  • Have no past or present diagnosis of a substance use disorder.

How to take part

Complete the survey to register your interest in participating.

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Prospective participants who meet our general eligibility criteria will be contacted with more specific information about studies and payment.

Contact us

For more information contact Eden Kartar - ib19482@bristol.ac.uk.