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TopA key principle of PD is giving voice to users (Bødker, Kensing & Simonsen, 2004), which has motivated the development of a broad collection of tools and techniques to meet this demand. Self-reporting techniques, diaries and (cultural) probes are classic techniques to enable even remote participation of end-users and have a long tradition in social sciences, ethnographic studies and PD as well (for an overview, see Muller & Druin, 2012). Recent developments in web-based technologies and mobile computing offer new opportunities for remote content-creation, such as taking pictures from daily situations and uploading and sharing them with a specific group of people directly from mobile phones. Common to all self-reporting techniques is that users are provided with tools, media and materials to document observations from their daily life, be they analogue (single-use camera), digital (photo camera, mobile phone) or web-based (to upload or create content). Typical user participation activities involve taking pictures, making short video-clips, recording audio-messages or writing short texts, mostly with mobile phones and photo/video-cameras (Carter & Mankoff, 2005; Go, 2007; Hagen, Robertson & Gravina, 2007; Isomursu, Kuutti & Väinämö, 2004; Katzeff & Ware, 2006; Landry, 2008; Lin & Okamoto, 2009; Muller & Druin, 2012).