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      The precision of visual memory for a complex contour shape measured by a freehand drawing task.

      1 ,
      Vision research
      Elsevier BV

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          Abstract

          Contour information is an important source for object perception and memory. Three experiments examined the precision of visual short-term memory for complex contour shapes. All used a new procedure that assessed recall memory for holistic information in complex contour shapes: Participants studied, then reproduced (without cues), a contoured shape by freehand drawing. In Experiment 1 memory precision was measured by comparing Fourier descriptors for studied and reproduced contours. Results indicated survival of lower (holistic) frequency information (i.e., ⩽5cycles/perimeter) and loss of higher (detail) frequency information. Secondary tasks placed demands on either verbal memory (Experiment 2) or visual spatial memory (Experiment 3). Neither secondary task interfered with recall of complex contour shapes, suggesting that the memory system maintaining holistic shape information was independent of both the verbal memory system and the visual spatial memory subsystem of visual short-term memory. The nature of memory for complex contour shape is discussed.

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          Author and article information

          Journal
          Vision Res.
          Vision research
          Elsevier BV
          1878-5646
          0042-6989
          Mar 07 2013
          : 79
          Affiliations
          [1 ] National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan. tosugi@fechner.c.u-tokyo.ac.jp
          Article
          S0042-6989(12)00392-6
          10.1016/j.visres.2012.12.002
          23296198
          e3f39022-ef1c-4b6a-b33d-9af4ba289bfb
          History

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