In April 2016 Manchester eScholar was replaced by the University of Manchester’s new Research Information Management System, Pure. In the autumn the University’s research outputs will be available to search and browse via a new Research Portal. Until then the University’s full publication record can be accessed via a temporary portal and the old eScholar content is available to search and browse via this archive.

Do common systems control eye movements and motion extrapolation?

Makin AJ, Poliakoff E

Quarterly Journal of Experimental Psychology. 2011;64:1327-1343.

Access to files

Full-text and supplementary files are not available from Manchester eScholar. Full-text is available externally using the following links:

Full-text held externally


People are able to judge the current position of occluded moving objects. This operation is known as motion extrapolation. It has previously been suggested that motion extrapolation is independent of the oculomotor system. Here we revisited this question by measuring eye position while participants completed two types of motion extrapolation task. In one task, a moving visual target travelled rightwards, disappeared, then reappeared further along its trajectory. Participants discriminated correct reappearance times from incorrect (too early or too late) with a two-alternative forced-choice button press. In the second task, the target travelled rightwards behind a visible, rectangular occluder, and participants pressed a button at the time when they judged it should reappear. In both tasks, performance was significantly different under fixation as compared to free eye movement conditions. When eye movements were permitted, eye movements during occlusion were related to participants’ judgements. Finally, even when participants were required to fixate, small changes in eye position around fixation (,28) were influenced by occluded target motion. These results all indicate that overlapping systems control eye movements and judgements on motion extrapolation tasks. This has implications for understanding the mechanism underlying motion extrapolation.

Bibliographic metadata

Type of resource:
Content type:
Publication type:
Publication form:
Published date:
Start page:
End page:
Digital Object Identifier:
Access state:

Institutional metadata

University researcher(s):

Record metadata

Manchester eScholar ID:
Created by:
Poliakoff, Ellen
27th January, 2011, 10:11:18
Last modified:
26th October, 2015, 17:20:11

Can we help?

The library chat service will be available from 11am-3pm Monday to Friday (excluding Bank Holidays). You can also email your enquiry to us.