Heading perception and the allocation of attention.
2533 - 2543.
A central theme in previous studies of heading judgements has been whether the retinal flow field can be decomposed to recover the translation component of locomotion when flow also contains the effects of gaze rotation. We explored not just the effect of moving gaze, but also moving attention away from the locomotor path by presenting the case of fixating a road sign and completing different attentional tasks during locomotion. Heading errors increased significantly with attentional load, in the absence of extra-retinal gaze information. When we introduced extra-retinal gaze information with the same tasks this resulted in a significant improvement in heading judgements. These results lead us to question whether the decomposition argument translates to real-world judgements of locomotor heading. If observers need to closely attend to roadside information it seems that decomposition is ineffective, whereas if they have the latitude to alternate gaze it is unnecessary. (C) 2000 Elsevier Science Ltd. All rights reserved.
|Title:||Heading perception and the allocation of attention|
|Keywords:||optic flow, motion, heading, attention, pursuit eye movement, EYE-MOVEMENTS, SELF-MOTION, OPTIC FLOW, DIRECTION, DEPTH, INFORMATION, ROTATIONS, JUDGMENTS, FOOT|
|UCL classification:||UCL > School of BEAMS > Faculty of Engineering Science > Computer Science|
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