Taking Part

Help us uncover how bodily signals and emotions shape mental health—and explore new ways to improve wellbeing. 

Why take part?

  • Advance Research

    By joining, you’ll help drive research that deepens our understanding of mental health and makes a real impact.

  • Earn Rewards

    Earn a minimum of £20 in Amazon vouchers, with bonus payments for your engagement in the app.

    If you take part for 5 months you can earn up to £60 in vouchers!

  • Personal Insights

    Receive feedback tailored to you, like insights about your sleep and wellness, and choose from a variety of personalised reports via the app. 

    You can also see how other app users are engaging in the study.

  • Latest Health Info

    Stay in the loop with exciting study updates and explore more about the research topics along the way. 
    Gain exclusive access to articles about interoception, the menstrual cycle and more! 
    Unlock access to a brand new interoception app designed specifically for this study.

Am I eligible to take part?

Male & Female Criteria

    • You’re a cisgender male or female aged 18-40. 

    • You live in the UK or EU and use English as one of your main languages. 

    • You use an iPhone (compatible with iPhone 7 or later running iOS 13 or later). 

    • You have impaired vision or hearing

    • You have a neurological condition (e.g brain injury, stroke) or a cardiac condition (e.g angina, heart disease)

    • You have been taking medication/s for a mental health condition for less than 6 months 

    • You’re above threshold for severe physical health anxiety sensitivity

    • You’re undergoing or waiting to undergo sex-reassignment hormone therapy or surgery (in the next 6 months) 

Additional Female Criteria

  • To understand more about the menstrual cycle and mental health, we need to recruit both: females who take hormonal contraception AND females who do not take any form of hormonal of contraception (i.e naturally cycling).

    If you have a natural cycle, this means:  

    • You've not taken any hormonal contraception for at least 6 months

    • You have not missed a period for 3 months or more (within the last 12 months) 

    • Your cycle length is considered regular (this will be assessed on enrolment into the study), and is defined as 25-35 days.

    OR if you are on hormonal contraception, you’re eligible if you are:  

    • Taking hormonal contraception for at least 6 months or more at enrolment 

    Note you can report changes to your contraception status in the app throughout the study.

    • Currently pregnant or breastfeeding (or pregnant in the last 12 months) 

    • Undergoing (or planning in the next 6 months) changes to your reproductive function that include: hysterectomy, ovarian surgery, IVF treatment, gender transitioning hormone treatment/s (i.e. testosterone), or changes to their contraception status 

    • Current (or a history of) hypothyroidism or hyperthyroidism 

 Click here to read our FAQs

This study has received favourable ethical approval from the University of Surrey Ethics Committee (ref number: FHMS 23-24 203 EGA/ERM ID 630)