Guided Sampling Using Mobile Electronic Diaries

Guided Sampling Using Mobile Electronic Diaries

Kenny Morrison (University of Dundee, UK)
Copyright: © 2012 |Pages: 24
DOI: 10.4018/jmhci.2012010101
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Pocket Interview is an easily configurable handheld electronic data collection and diary tool. The Pocket Interview system can be used to apply experience sampling methods that allow the collection of data in real-time and in the user’s natural environment. The system client is usually run on a personal digital assistant or smartphone. It can prompt the user to make diary entries at fixed and/or random intervals and includes an option that allows this sampling to be ‘guided’ whereby inconvenient prompts are temporarily deferred until a more convenient time through the use of contextual audio information. Subjects participating in real-time studies require high levels of commitment and exhibit difficulties maintaining their motivation. This paper describes a series of studies using Pocket Interview that explore how Guiding offers to reduce the perceived burden on study participants, improve response rates and increase the quantity and quality of replies.
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Audio Recording

For the experiments described later in this paper a Dell Axim X51 PDA was used running the Pocket Interview client software (Figure 1). Audio data was sampled using the PDA microphone at 22kHz with 16-bit depth in 3-second samples. Low-resolution audio samples of 3-second length recorded by PDAs have been demonstrated as sufficient to classify different environments such as offices, streets, bars and car-driving (Ma, Milner, & Smith, 2006).

Figure 1.

A PDA running the pocket interview client


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