A comparison of blindpulling and blindwalking as measures of perceived absolute distance |
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Authors: | John W Philbeck Adam J Woods Carly Kontra Petra Zdenkova |
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Institution: | 1.Department of Psychology,George Washington University,Washington |
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Abstract: | Blindwalking has become a common measure of perceived absolute distance and location, but it requires a relatively large testing
space and cannot be used with people for whom walking is difficult or impossible. In the present article, we describe an alternative
response type that is closely matched to blindwalking in several important respects but is less resource intensive. In the
blindpulling technique, participants view a target, then close their eyes and pull a length of tape or rope between the hands to indicate
the remembered target distance. As with blindwalking, this response requires integration of cyclical, bilateral limb movements
over time. Blind-pulling and blindwalking responses are tightly linked across a range of viewing conditions, and blind-pulling
is accurate when prior exposure to visually guided pulling is provided. Thus, blindpulling shows promise as a measure of perceived
distance that may be used in nonambulatory populations and when the space available for testing is limited. |
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