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The Performance Equation

The art, science and practice of achieving your goals

Home: Welcome
Student Behind the Books


The Performance Equation is a formula that can help individuals, teams and organisations unlock their full potential and achieve their goals both personally and professionally.  This approach to achieving success is based on Tim Gallwey's performance equation from his best selling book 'The Inner Game':

Performance = potential - interference 



This method therefore involves working with clients on two main areas:

1. Realising potential 

Grounded in positive psychology, I help people to gain insight in to their strengths, virtues and motivations and to align them to their personal and/or organisational goals and values, galvanising effort, commitment and enjoyment in the pursuit of excellence.

2. Reducing interference

Grounded in performance psychology, I provide people with the knowledge, tools and techniques to recognise and manage internal or mental obstacles to achieving their goals.  

How can we help?

For organisations

We want to invest in our people to improve productivity and wellbeing

For individuals

I'm looking for a coach to help me to meet my goals

For coaches

I'm a looking for a continuing professional development course in coaching psychology or coaching supervision

For athletes

I want to optimise performance

Home: Coaching


What People Are Saying

Mike - Project Manager

"I wanted to change my career direction and was given the opportunity to work with a Coach within my organisation.  Marie helped me to break down my goal in to smaller targets.  The result was that I managed to achieve my goal within 12 months and move into a position within my chosen sector. Marie was very personable and knowledgeable and I found the experience extremely enjoyable and productive. I would recommend Marie to anyone who is thinking about a career change and requires the advice and direction to achieve this.”

CEO - Ultracomms

“We engaged with Marie about 18 months ago. Our organisation was fast growing and we had just started to build a new executive team to take the business forward. As CEO I realised that whilst we had the individual talent in the team we had yet found a way to get the best out of each other and work as a team.   This  work allowed us to agree and be clear of what our business goals were and more importantly how individually and collectively we were going to achieve them.  Now 18 months on we continue to grow and build on our success and we are ready for the next chapter in the Ultracomms business plan. Without Marie’s insight and input I doubt very much if we would have got to where we are. One key thing is that Marie is a friendly, open individual and she made the whole process enjoyable and fun.”

Val - Finance Manager

“Marie has helped me focus on the priorities in my life and gain perspective. She has helped me find the skills within myself to deal successfully with problems and anxiety as they arise. I am now more aware of 'enjoying the moment' and worry less about things that are unimportant to me.  Having coaching was one of the most rewarding things I have done and I would highly recommend Marie to anyone who would like to get more out of their life personally and professionally.”

CEO - Toro Recruitment

“Dr Stopforth came in to facilitate a company training session with the aim of generating our internal company values. The session was very productive and executed in a way that drew several ideas out of every member of staff. When needed, Dr Stopforth prodded and probed to ensure everyone had complete clarity on the information being generated.  Following the ideas discussed from the training session, Toro has created a framework of values.  I would highly recommend Dr Stopforth’s work and will be using her services in the future.”

Cass - Interior Designer

“Having had my  coaching sessions with Marie, I have a much clearer focus on where I want to go. Her affable relaxed approach helped me to open up and feel comfortable discussing my plans (and oftentimes neurosis). Loved that I was able to access the mind of a qualified psychologist. Thanks to our sessions I feel more in control, decisive and am actually able to visualise my 5 year plan and take the steps forward”

Darcy - Editor

“I enrolled in coaching with Marie when I entered a time of uncertainty and instability in my career. In our time together, Marie helped me to find clarity, direction and enthusiasm. During our regular meetings, Marie focused the conversation to establish the root issues and then guided me to finding my own resolutions. Her friendly and positive attitude, her sound advice and her extensive knowledge meant that each session was valuable, educational and empowering. I truly appreciate Marie’s work with me and I would heartily recommend her to anyone in need of motivation and support. ”

Upcoming Events


500 Terry Francois Street San Francisco, CA 94158

07860 343070

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