Naturalistic Driving Study: Technical Coordination and Quality Control (2014) / Chapter Skim
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Pages 68-69
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68 C h a p t e r 5 The use of hand-held mobile devices (e.g., cell/smart phones) has skyrocketed in recent years, transforming our world in many ways.
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69 Thus, the amount of data collected from each individual varied based on a variety of factors, including the following: • Duration of participation in study with overlapping cell phone use (a range of 24+ to 3 months) ; • How much data could be accessed based on the estimated retention periods noted in Table 5.1; • Whether or not text, picture, or video messages were included in each month of data; and • The participant's ability to generate the data (i.e., those for whom a direct feed from the provider was not available as specified above)
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