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Perceived size and perceived direction: The interplay of the two descriptors of visual space
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SYSNO ASEP 0366234 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Perceived size and perceived direction: The interplay of the two descriptors of visual space Author(s) Šikl, Radovan (PSU-E) ORCID, RID, SAI
Šimeček, Michal (PSU-E)Number of authors 2 Source Title Perception - ISSN 0301-0066
Roč. 40, č. 8 (2011), s. 953-961Number of pages 9 s. Language eng - English Country NL - Netherlands Keywords visual space ; spatial descriptors ; size judgments ; direction judgments ; parameterization Subject RIV AN - Psychology R&D Projects GPP407/10/P566 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z70250504 - PSU-E (2005-2011) UT WOS 000297141700006 EID SCOPUS 80053969803 DOI 10.1068/p6537 Annotation The stimulus in the outdoor psychophysical experiment was formed by two rods placed on the ground plane over a range of distances and orientations. Observers estimated its size and direction by positioning the third rod to form an evenly spaced collinear triple of rods. The data revealed interesting similarities between the profiles of the deviations in both judgments: for size judgments, the variability of the responses was least when the targets were at a frontal orientation and gradually increased as the orientation approached the medial plane. For direction judgments, the variability of the responses was least when the stimuli were aligned with the observer’s line of sight and gradually increased as the orientation approached the frontoparallel plane. The finding of inverse relationship between the precision of size and direction judgments is interpreted as a consequence of the unequal precision in localisation between the frontal and in-depth dimensions of visual space. Workplace Institute of Psychology Contact Štěpánka Halamová, Halamova@praha.psu.cas.cz, Tel.: 222 222 096 Year of Publishing 2012
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