Journal article Open Access

# Antigravity Hills are Visual Illusions

Bressan, Paola; Garlaschelli, Luigi; Barracano, Monica

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<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
<dc:creator>Bressan, Paola</dc:creator>
<dc:creator>Garlaschelli, Luigi</dc:creator>
<dc:creator>Barracano, Monica</dc:creator>
<dc:date>2003-09-01</dc:date>
<dc:description>Antigravity hills, also known as spook hills or magnetic hills, are natural places where cars put into neutral are seen to move uphill on a slightly sloping road, apparently defying the law of gravity. We show that these effects, popularly attributed to gravitational anomalies, are in fact visual illusions. We re-created all the known types of antigravity spots in our laboratory using tabletop models; the number of visible stretches of road, their slant, and the height of the visible horizon were systematically varied in four experiments. We conclude that antigravity-hill effects follow from a misperception of the eye level relative to gravity, caused by the presence of either contextual inclines or a false horizon line.</dc:description>
<dc:identifier>https://zenodo.org/record/1006741</dc:identifier>
<dc:identifier>10.1111/1467-9280.02451</dc:identifier>
<dc:identifier>oai:zenodo.org:1006741</dc:identifier>
<dc:language>eng</dc:language>
<dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
<dc:source>Psychological Science 14(5) 441-449</dc:source>
<dc:title>Antigravity Hills are Visual Illusions</dc:title>
<dc:type>info:eu-repo/semantics/article</dc:type>
<dc:type>publication-article</dc:type>
</oai_dc:dc>

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