Mental imagery is ubiquitous in daily life, and can be experienced in a variety of situations, such as when imagining the smile of close friend, the colours in a favourite painting or a possible shortcut to a destination. Recently we discovered that binocular rivalry (a type of ambiguous vision) could be employed as an effective tool to measure a single instance of imagery (Pearson, Clifford & Tong, 2008). This exciting discovery allowed us to show that visual imagery is much like a weak version of normal vision, displaying many the characteristics of low-level visual perception. Despite imagery’s importance to most sensory and cognitive processes it remains poorly understood. The lab is in the process of using this newly discovered investigative tool to shed light on many of the mysteries surrounding mental imagery.