Mon-Williams, M., Tresilian, J.R., Plooy, A., Wann, J.P. and Broerse, J. (1997) Looking at the task in hand: vergence eye movements and perceived size. Experimental Brain Research, 117 (3). pp. 501-506. ISSN 0014-4819
A retinal afterimage of the hand changes size when the same unseen hand is moved backwards and forwards in darkness. We demonstrate that arm movements per se are not sufficient to cause a size change and that vergence eye movements are a necessary and sufficient condition for the presence of the illusory size change. We review previous literature to illustrate that changing limb position in the dark alters vergence angle and we explain the illusion via this mechanism. A discussion is provided on why altering limb position causes a change in vergence and we speculate on the underlying mechanisms.
|Keywords:||vergence; depth perception; illusion; accommodation; Emmert's law|
|Institution:||The University of Leeds|
|Academic Units:||The University of Leeds > Faculty of Medicine and Health (Leeds) > School of Psychology (Leeds) > Cognitive Psychology (Leeds)|
|Depositing User:||Repository Officer|
|Date Deposited:||18 Jun 2009 11:11|
|Last Modified:||18 Jun 2015 17:29|