There have been countless studies demonstrating the relationship between faster web pages and improvement to a vast array of business metrics. For most websites, images represent a huge untapped area of opportunity for optimizing performance as images comprise more than half of a typical page’s weight. While default image rendering formats rarely result in the best possible user experience, optimizing images is necessary to serve a better, faster user experience. To make pages faster, site owners need to take advantage of every available image optimization technique. Therefore, we went to the neuroscience lab to see if we could definitively answer the question: which image format results in happier users? Visit here: http://www.radware.com/social/neurostrata-fall2014/ to learn more and to download the "Progressive Image Rendering: Good or Evil" Report.