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What do hands know about hills? Interpreting Taylor-Covill and Eves (2013) in context()
Hills appear much steeper than they are. Although near surface slant is also exaggerated, near surfaces appear much shallower than equivalently slanted hills. Taylor-Covill and Eves (2013) propose a new type of palm orientation measuring device that provides outputs that accurately reflect the physi...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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2013
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3870886/ https://www.ncbi.nlm.nih.gov/pubmed/23938050 http://dx.doi.org/10.1016/j.actpsy.2013.07.014 |
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author | Durgin, Frank H. |
author_facet | Durgin, Frank H. |
author_sort | Durgin, Frank H. |
collection | PubMed |
description | Hills appear much steeper than they are. Although near surface slant is also exaggerated, near surfaces appear much shallower than equivalently slanted hills. Taylor-Covill and Eves (2013) propose a new type of palm orientation measuring device that provides outputs that accurately reflect the physical slants of stairs and hills from 19 to 30° and also seems to accurately reflect the slants of near surfaces (25–30°). They question the validity of the observations of Durgin, Hajnal, Li, Tonge & Stigliani (2010), who observed that palm boards grossly underestimated near surfaces. Here I review our recent work on the visual and haptic perception of near surface orientation in order to place Taylor-Covill and Eves' arguments in context. I note in particular that free hand measures of real surfaces in near space show excellent calibration, but free hand measures show gross exaggeration for hills. This leads to the question of the grounds for preferring a mechanical device to a freely wielded hand. In addition I report an investigative replication of the crucial observations that led to our concerns about the value of palm boards as measures of perception and note the specific methodological details that we have accounted for in our procedures. Finally, I propose some testable hypotheses regarding how better-than-expected haptic matches to hills may arise. |
format | Online Article Text |
id | pubmed-3870886 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
record_format | MEDLINE/PubMed |
spelling | pubmed-38708862014-10-01 What do hands know about hills? Interpreting Taylor-Covill and Eves (2013) in context() Durgin, Frank H. Acta Psychol (Amst) Article Hills appear much steeper than they are. Although near surface slant is also exaggerated, near surfaces appear much shallower than equivalently slanted hills. Taylor-Covill and Eves (2013) propose a new type of palm orientation measuring device that provides outputs that accurately reflect the physical slants of stairs and hills from 19 to 30° and also seems to accurately reflect the slants of near surfaces (25–30°). They question the validity of the observations of Durgin, Hajnal, Li, Tonge & Stigliani (2010), who observed that palm boards grossly underestimated near surfaces. Here I review our recent work on the visual and haptic perception of near surface orientation in order to place Taylor-Covill and Eves' arguments in context. I note in particular that free hand measures of real surfaces in near space show excellent calibration, but free hand measures show gross exaggeration for hills. This leads to the question of the grounds for preferring a mechanical device to a freely wielded hand. In addition I report an investigative replication of the crucial observations that led to our concerns about the value of palm boards as measures of perception and note the specific methodological details that we have accounted for in our procedures. Finally, I propose some testable hypotheses regarding how better-than-expected haptic matches to hills may arise. 2013-08-09 2013-10 /pmc/articles/PMC3870886/ /pubmed/23938050 http://dx.doi.org/10.1016/j.actpsy.2013.07.014 Text en http://creativecommons.org/licenses/by-nc/3.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike License, which permits non-commercial use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Article Durgin, Frank H. What do hands know about hills? Interpreting Taylor-Covill and Eves (2013) in context() |
title | What do hands know about hills? Interpreting Taylor-Covill and Eves (2013) in context() |
title_full | What do hands know about hills? Interpreting Taylor-Covill and Eves (2013) in context() |
title_fullStr | What do hands know about hills? Interpreting Taylor-Covill and Eves (2013) in context() |
title_full_unstemmed | What do hands know about hills? Interpreting Taylor-Covill and Eves (2013) in context() |
title_short | What do hands know about hills? Interpreting Taylor-Covill and Eves (2013) in context() |
title_sort | what do hands know about hills? interpreting taylor-covill and eves (2013) in context() |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3870886/ https://www.ncbi.nlm.nih.gov/pubmed/23938050 http://dx.doi.org/10.1016/j.actpsy.2013.07.014 |
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