Nathalie Nahai is a web psychologist, international speaker and author of the best-selling book, Webs of Influence: The Psychology of Online Persuasion (Pearson).  The foremost expert in web psychology, Nathalie helps businesses apply scientific rigour to their website design, content marketing and products. She has worked with Fortune 500 companies, design agencies and SMEs, including Google, eBay, Unilever and Harvard Business Review, to name a few. Nathalie lectures internationally on the digital application of behavioural sciences, co-hosts the Guardian’s Tech Weekly podcast, and contributes to national publications, TV and radio on the subject of online behaviour. She is also the founder of Humanise The Web (a conference that explores both how the internet influences our behaviours, and how businesses can harness persuasive technologies for good), and sits on the Social Media Week advisory board and Ogilvy Change experts’ panel. @NathalieNahai