Do Explicit Estimates Of Angular Declination Become Ungrounded In The Presence Of A Ground Plane?

Authors

Umi I. Keezing , '19
Frank H. Durgin, Swarthmore CollegeFollow

Document Type

Article

Publication Date

10-29-2018

Published In

i-Perception

Abstract

In a series of seven experiments (total N = 220), it is shown that explicit angular declination judgments are influenced by the presence of a ground plane in the background. This is of theoretical importance because it bears on the interpretation of the relationship between angular declination and perceived distance on a ground plane. Explicit estimates of ground distance are consistent with a simple 1.5 gain in the underlying perceived angular declination function. The experiments show that, in general, functions of estimates of perceived angular declination have a slope of 1.5, but that an additional intercept can often be observed as a result of incorporating changes in ground distance into reports of changes in angular declination. By varying the background context, a variety of functions were observed that are consistent with this contamination hypothesis.

Keywords

distance perception, angular declination, magnitude estimation

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This work is licensed under a Creative Commons Attribution 4.0 International License.

Comments

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Recommended Citation

Umi I. Keezing , '19 and Frank H. Durgin. (2018). "Do Explicit Estimates Of Angular Declination Become Ungrounded In The Presence Of A Ground Plane?". i-Perception. DOI: 10.1177/2041669518808536
https://works.swarthmore.edu/fac-psychology/1114