In contemporary Western societies, the visual domain has come to assume a thus far unprecedented cultural centrality. Daily life is replete with a potentially endless stream of images and other visual messages: from the electronic and paper- based billboards of the street, to the TV and Internet feeds of the home. The visual has become imbued with a symbolic potency, a signifying power that seemingly eclipses that of all other sensory data. The central aim of this four-volume collection is to explore key approaches to visual research methods and to consider some of the core principles, issues, debates and controversies surrounding the use of visual techniques in relation to three key enterprises: 1) documentation and representation; 2) interpretation and classification and 3) elicitation and collaboration.