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Comparing the effect of temporal delay on the availability of egocentric and allocentric information in visual search.
Behav Brain Res. 2017 07 28; 331:38-46.BB

Abstract

Frames of reference play a central role in perceiving an object's location and reaching to pick that object up. It is thought that the ventral stream, believed to subserve vision for perception, utilises allocentric coding, while the dorsal stream, argued to be responsible for vision for action, primarily uses an egocentric reference frame. We have previously shown that egocentric representations can survive a delay; however, it is possible that in comparison to allocentric information, egocentric information decays more rapidly. Here we directly compare the effect of delay on the availability of egocentric and allocentric representations. We used spatial priming in visual search and repeated the location of the target relative to either a landmark in the search array (allocentric condition) or the observer's body (egocentric condition). Three inter-trial intervals created minimum delays between two consecutive trials of 2, 4, or 8seconds. In both conditions, search times to primed locations were faster than search times to un-primed locations. In the egocentric condition the effects were driven by a reduction in search times when egocentric information was repeated, an effect that was observed at all three delays. In the allocentric condition while search times did not change when the allocentric information was repeated, search times to un-primed target locations became slower. We conclude that egocentric representations are not as transient as previously thought but instead this information is still available, and can influence behaviour, after lengthy periods of delay. We also discuss the possible origins of the differences between allocentric and egocentric priming effects.

Authors+Show Affiliations

Department of Psychology, Durham University, UK. Electronic address: k.l.ball@durham.ac.uk.Department of Psychology, Durham University, UK.Department of Psychology, Durham University, UK.Department of Psychology, Durham University, UK.Klinische Neuropsychologie, Department Psychologie, Ludwig-Maximilians-Universität München, Munich, Germany.

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

28526516

Citation

Ball, Keira, et al. "Comparing the Effect of Temporal Delay On the Availability of Egocentric and Allocentric Information in Visual Search." Behavioural Brain Research, vol. 331, 2017, pp. 38-46.
Ball K, Birch Y, Lane A, et al. Comparing the effect of temporal delay on the availability of egocentric and allocentric information in visual search. Behav Brain Res. 2017;331:38-46.
Ball, K., Birch, Y., Lane, A., Ellison, A., & Schenk, T. (2017). Comparing the effect of temporal delay on the availability of egocentric and allocentric information in visual search. Behavioural Brain Research, 331, 38-46. https://doi.org/10.1016/j.bbr.2017.05.018
Ball K, et al. Comparing the Effect of Temporal Delay On the Availability of Egocentric and Allocentric Information in Visual Search. Behav Brain Res. 2017 07 28;331:38-46. PubMed PMID: 28526516.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Comparing the effect of temporal delay on the availability of egocentric and allocentric information in visual search. AU - Ball,Keira, AU - Birch,Yan, AU - Lane,Alison, AU - Ellison,Amanda, AU - Schenk,Thomas, Y1 - 2017/05/16/ PY - 2017/03/13/received PY - 2017/05/05/revised PY - 2017/05/06/accepted PY - 2017/5/21/pubmed PY - 2018/4/4/medline PY - 2017/5/21/entrez KW - Allocentric coding KW - Delay KW - Egocentric coding KW - Location priming KW - Spatial memory KW - Visual search SP - 38 EP - 46 JF - Behavioural brain research JO - Behav. Brain Res. VL - 331 N2 - Frames of reference play a central role in perceiving an object's location and reaching to pick that object up. It is thought that the ventral stream, believed to subserve vision for perception, utilises allocentric coding, while the dorsal stream, argued to be responsible for vision for action, primarily uses an egocentric reference frame. We have previously shown that egocentric representations can survive a delay; however, it is possible that in comparison to allocentric information, egocentric information decays more rapidly. Here we directly compare the effect of delay on the availability of egocentric and allocentric representations. We used spatial priming in visual search and repeated the location of the target relative to either a landmark in the search array (allocentric condition) or the observer's body (egocentric condition). Three inter-trial intervals created minimum delays between two consecutive trials of 2, 4, or 8seconds. In both conditions, search times to primed locations were faster than search times to un-primed locations. In the egocentric condition the effects were driven by a reduction in search times when egocentric information was repeated, an effect that was observed at all three delays. In the allocentric condition while search times did not change when the allocentric information was repeated, search times to un-primed target locations became slower. We conclude that egocentric representations are not as transient as previously thought but instead this information is still available, and can influence behaviour, after lengthy periods of delay. We also discuss the possible origins of the differences between allocentric and egocentric priming effects. SN - 1872-7549 UR - https://www.unboundmedicine.com/medline/citation/28526516/Comparing_the_effect_of_temporal_delay_on_the_availability_of_egocentric_and_allocentric_information_in_visual_search_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0166-4328(17)30442-4 DB - PRIME DP - Unbound Medicine ER -