Touch-screen task-element times for improving SAE recommended practice J2365 : a first proposal.
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2015-10-01
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Abstract:This report describes the identification of task elements and the estimation of their times for in-vehicle tasks such as dialing a phone number or finding a song using a touch screen. These ; elements were derived from an experiment in which 24 drivers distributed across three age groups ; completed 40 trials involving various in-vehicle tasks. These data will be used to develop a new ; version of Society of Automotive Engineers Recommended Practice J2365, which is used to ; predict task times when the driver interface is at the wireframe stage, well before hardware and ; software are available to collect driver-performance data. The predicted, static (non-driving) task ; times are used to predict which tasks are most likely to be unacceptably distracting and unsafe to ; do while driving. ; Based on those data, the following elements were identified along with initial estimates for young ; drivers (age = 24). Estimates for other ages can be obtained by multiplying the times that follow ; by age-correction factors described in the report. Elements and their times include cursor other ; (read page content, 2.4 s), cursor 1 (cursor down an first ordered page, 2.7 s), cursor 2 (cursor ; down on a subsequent page, 0.8 s), drag (3.5 s), function button 1 (for initial screen, 2.9 s), ; function button 2 (2.4 s for following screens), press and hold (a button, 1.6 s), letter 1 (entering a ; letter on a new screen, 1.9 s), letter 2 (entering a subsequent letter, 1.0 s), number 1 (entering a ; number on a new screen, 1.4 s), number 2 (entering a number on a subsequent screen (0.7 s), ; slider s (after a new screen, 5.0 s), and slider 2 (after the first, 2.5 s).
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Main Document Checksum:urn:sha256:ec310d6f021c3aa388cfb637de21cbbba8fee3e3bea52e73c34d3103c1d56719