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Time-Order Errors in Duration Judgment Are Independent of Spatial Positioning

Harrison, C; Binetti, N; Mareschal, I; Johnston, A; (2017) Time-Order Errors in Duration Judgment Are Independent of Spatial Positioning. Frontiers in Psychology , 8 , Article ARTN 340. 10.3389/fpsyg.2017.00340. Green open access

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Abstract

Time-order errors (TOEs) occur when the discriminability between two stimuli are affected by the order in which they are presented. While TOEs have been studied since the 1860s, it is unknown whether the spatial properties of a stimulus will affect this temporal phenomenon. In this experiment, we asked whether perceived duration, or duration discrimination, might be influenced by whether two intervals in a standard two-interval method of constants paradigm were spatially overlapping in visual short-term memory. Two circular sinusoidal gratings (one standard and the other a comparison) were shown sequentially and participants judged which of the two was presented for a longer duration. The test stimuli were either spatially overlapping (in different spatial frames) or separate. Stimulus order was randomized between trials. The standard stimulus lasted 600 ms, and the test stimulus had one of seven possible values (between 300 and 900 ms). There were no overall significant differences observed between spatially overlapping and separate stimuli. However, in trials where the standard stimulus was presented second, TOEs were greater, and participants were significantly less sensitive to differences in duration. TOEs were also greater in conditions involving a saccade. This suggests there is an intrinsic memory component to two interval tasks in that the information from the first interval has to be stored; this is more demanding when the standard is presented in the second interval. Overall, this study suggests that while temporal information may be encoded in some spatial form, it is not dependent on visual short-term memory.

Type: Article
Title: Time-Order Errors in Duration Judgment Are Independent of Spatial Positioning
Open access status: An open access version is available from UCL Discovery
DOI: 10.3389/fpsyg.2017.00340
Publisher version: http://dx.doi.org/10.3389/fpsyg.2017.00340
Language: English
Additional information: © 2017 Harrison, Binetti, Mareschal and Johnston. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Keywords: Social Sciences, Psychology, Multidisciplinary, Psychology, visual perception, time perception, visual short-term memory (VSTM), retinotopy, spatiotopy, time-order errors, SHORT-TERM-MEMORY, NEURAL MECHANISMS, DISCRIMINATION, PERCEPTION, OBJECTS, FRAMES, SPACE, MODEL
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences > UCL Interaction Centre
URI: https://discovery.ucl.ac.uk/id/eprint/1558757
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