Mark Wagner’s scientific contributions

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Publications (1)

The Geometries of Visual Space
  • Article

November 2012

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208 Reads

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135 Citations

Mark Wagner

In addition, The Geometries of Visual Space: * contains philosophical, mathematical, and psychophysical background material; * looks at synthetic approaches to space perception including work on hyperbolic, spherical, and Euclidean geometries; * presents a meta-analysis of studies that ask observers to directly estimate size, distance, area, angle, and volume; * looks at the size constancy literature in which observers are asked to adjust a comparison stimulus to match a variety of standards at different distances away; * discusses research that takes a multi-dimensional approach toward studying visual space; and * discusses how spatial experience is influenced by memory.

Citations (1)

... Importantly, the large-scale HVI (with a gain of up to 1.25) seems to correspond to the differential angular biases in azimuth (1.20) and elevation (1. 5) that have been reported in the literature [22][23][24][25]. Because angular variables such as angular declination (the egocentric angular direction below straight ahead where an object makes contact with the ground) is a strong cue for visual distance [26][27][28][29], the observed angular expansion in elevation (with a gain of about 1.5 [22]) can quantitatively explain the underestimation of egocentric ground distance that is normally observed [30][31][32]. Although the large-scale HVI does not obviously seem to depend on perceived ground distance, there is some evidence that it actually does. ...

Reference:

Large Bias in Matching Small Horizontal and Vertical Extents Separated in Depth in the Real World Is Similar for Upright and Supine Observers
The Geometries of Visual Space
  • Citing Article

  • November 2012

Mark Wagner