When I first started working as an eLearning instructional designer I became interested in the learning process and how people learn. I figured that if I knew more about information processing and learning, I could hopefully design more effective courses and materials. I came across a book called Efficiency in Learning: Evidence-Based Guidelines to Manage Cognitive Load by Ruth Colvin Clark, Frank Nguyen and John Sweller. In this book I discovered – among other things – Cognitive Load Theory (CLT) which is based on studies of human cognitive architecture – how we process and organise information.