Deborah O'Malley

Deborah O’Malley, M.Sc. is a guest speaker at Nielsen Norman Group (NN/G) and the founder of GuessTheTest. She helps product, growth, and marketing teams design, test, and scale high-performing digital experiences through rigorous UX research, A/B testing, and AI-informed analytics. 

With a master of science focused on eye tracking technology, Deborah began her career running large-scale government usability studies before specializing in Conversion Rate Optimization (CRO) and A/B testing. This foundation shaped her mixed-methodology approach, giving her a unique data-driven vantage point across research and optimization.

Deborah's research includes six peer-reviewed publications on eye tracking and marketing psychology. She also created a LinkedIn Learning course that has reached thousands of learners and is a distinguished adjunct professor at Queen’s University’s renowned Smith School of Business. 

Recognized as a top A/B testing influencer, leading women CRO specialist, and Kameleoon Experimentation Thought Leader, Deborah shares practical insights with a community of 22,000+ followers on LinkedIn. 

When not optimizing websites or teaching how to do so, Deborah can be found in the kitchen making homemade fudge or burning it off at the gym.