The Experiment Mindset: Unlocking the Science of Personal Growth - Softcover

Simounds, Tamsin

Softcover

ISBN 10: 1394389396 ISBN 13: 9781394389391

Publisher: Wiley, 2026

Synopsis

Your next breakthrough starts with one experiment.

You've done the courses, listened to the podcasts, made the plans. But you're still stuck in the same patterns. The problem isn't your ambition ― it's that you've been trying to think your way into change when you need to experiment your way there.

The Experiment Mindset offers a radically different path. Drawing on cutting-edge neuroscience, behavioural psychology and over a decade working with leaders and founders,​ ​leadership expert Tamsin Simounds reveals how real transformation happens: not through what worked for someone else, but through discovering what works for your brain, body, and life.

• Apply the Three Levers of Change (Psychology, Physiology, Environment) to create sustainable growth
• Become your own best experiment and gather real data about what works for you
• Navigate failure as feedback, turning setbacks into stepping stones
• Build ​​wisdom through action, not endless planning
• Rewire your brain to help you adapt to constant change

The Experiment Mindset is a science-backed, story-rich guide for ambitious professionals, emerging leaders and anyone tired of fluffy advice. With practical frameworks, real-world examples and actionable experiments you can start today, you'll learn how to evolve through change ― one small, courageous ​​test at a time.

About this title

About the Author

TAMSIN SIMOUNDS is a leadership expert and keynote speaker whose expertise has been featured in Thrive Global, Smart Company, Business Chicks and Women’s Agenda. With a decade of lived leadership experience and another decade coaching leaders, she has worked across industries from big banks and fast-growth tech startups to social enterprises and small businesses.

From the Back Cover

Stop planning your growth. Start experimenting your way there.

You’ve consumed the podcasts, devoured the books, mapped out countless plans. Yet here you are, still wrestling with the same patterns, waiting for the breakthrough that never quite arrives. You’ve got the drive and the discipline. What you need now is to stop thinking about transformation and to start experimenting with it.

In The Experiment Mindset, leadership coach and behaviour change expert Tamsin Simounds draws on cutting-edge neuroscience to reveal why traditional goal-setting keeps you stuck―and offers a liberating alternative. Through the Three Levers of Change (psychology, physiology, and environment) you’ll discover how low-risk, high-learning experiments can unlock the kind of growth that perfect planning never could.

Inside, you’ll learn how to:

• replace soul-crushing perfection with energising curiosity
• pull the three levers that actually drive lasting change
• design bite-sized experiments that build real momentum
• transform failure from identity threat to valuable feedback
• rewire your brain to thrive amid constant change.

Growth doesn’t happen from having all the answers. It comes from running better experiments. With The Experiment Mindset you’ll stop waiting to feel ready and start evolving through change―one small, courageous experiment at a time.

Edition details

• Publisher: Wiley
• Publication date: 2026
• Language: English
• ISBN 10: 1394389396
• ISBN 13: 9781394389391
• Binding: Paperback
• Edition number: 1
• Number of pages: 256