Niels Henze, Martin Pielot
Studies in HCI research are often conducted in a highly controlled environment with a small, convenient sample. Such studies can have a high internal validity but often lack external validity. That is, the findings themselves can be reliable but cannot always be generalized to real contexts. To address this problem, researchers recently started to use app stores to bring mobile HCI research into people's lives, as opposed to bringing people into the lab. Here, we present two studies in which we published apps on Google Play. This allowed us to collect usage data from thousands of people who used…
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