By Benjamin Poppinga, Martin Pielot, Niels Henze, and Susanne Boll
To observe the mobile user experience various observation techniques exist. For field studies ethnographic observation techniques, like shadowing, are often used. In shadowing, an experimenter follows a participant and takes notes on the observed behaviour. Shadowing is known to be highly situated [3, 5]. However, this technique does not scale very well. Additionally, because of its obtrusiveness, it could change the observed participant’s behaviour.
To overcome the disadvantages of low scalability and high obtrusiveness, new observation methods are being developed. In theory, passive automated logging through sensors seems to reach the same “situatedness”, while being scalable and unobtrusive [3, 5]. In practice logging has rarely been applied to mobile observation during the last years. One reason for this might be that suitable data sources, e.g. sensors, were not available on a common mobile device. However, the extension of smart phones through external sensors showed that sensors are able to infer users’ everyday situations [2].
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