Naturalistic Driving Study: Descriptive Comparison of the Study Sample with National Data (2015) / Chapter Skim
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Pages 12-15
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From page 12... ...
12 The guiding principle of the original SHRP 2 NDS sampling plan was to recruit an equal number of male and female licensed drivers in each of several carefully selected age ranges. These age ranges were designed to sample across the full breadth of the driver age spectrum, oversampling the youngest and oldest segments of the study population.
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From page 13... ...
13 Figure 3.1 illustrates the overwhelming success of convenience methods as opposed to random or focused calling approaches, particularly among individuals aged 35 and younger. Although at first glance the 16- to 17-year-old subgroup appears to be an exception to this characterization, it is important to note that many of the teen drivers included in the study who identified as coming into the program through the call center did so as additional primary drivers of parents recruited via that method.
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From page 14... ...
14 to produce the anticipated number of drivers of AVT vehicles, despite the procurement of household data from R
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From page 15... ...
15 in the study, vehicle eligibility criteria were expanded to permit a greater proportion of recruits to become actual study participants. In particular, the addition of older model years attracted more drivers in the younger age groups.
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