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      Sensitivity of eye-movement measures to in-vehicle task difficulty

      , ,
      Transportation Research Part F: Traffic Psychology and Behaviour
      Elsevier BV

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          Where we look when we steer.

          Steering a car requires visual information from the changing pattern of the road ahead. There are many theories about what features a driver might use, and recent attempts to engineer self-steering vehicles have sharpened interest in the mechanisms involved. However, there is little direct information linking steering performance to the driver's direction of gaze. We have made simultaneous recordings of steering-wheel angle and drivers' gaze direction during a series of drives along a tortuous road. We found that drivers rely particularly on the 'tangent point' on the inside of each curve, seeking this point 1-2 s before each bend and returning to it throughout the bend. The direction of this point relative to the car's heading predicts the curvature of the road ahead, and we examine the way this information is used.
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            Change detection.

            Five aspects of visual change detection are reviewed. The first concerns the concept of change itself, in particular the ways it differs from the related notions of motion and difference. The second involves the various methodological approaches that have been developed to study change detection; it is shown that under a variety of conditions observers are often unable to see large changes directly in their field of view. Next, it is argued that this "change blindness" indicates that focused attention is needed to detect change, and that this can help map out the nature of visual attention. The fourth aspect concerns how these results affect our understanding of visual perception-for example, the implication that a sparse, dynamic representation underlies much of our visual experience. Finally, a brief discussion is presented concerning the limits to our current understanding of change detection.
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              In what ways do eye movements contribute to everyday activities?

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                Author and article information

                Journal
                Transportation Research Part F: Traffic Psychology and Behaviour
                Transportation Research Part F: Traffic Psychology and Behaviour
                Elsevier BV
                13698478
                March 2005
                March 2005
                : 8
                : 2
                : 167-190
                Article
                10.1016/j.trf.2005.04.014
                d5bec32c-5b80-4846-a789-400ec35ef36c
                © 2005

                http://www.elsevier.com/tdm/userlicense/1.0/

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