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.