Left to Right: Representational biases for numbers and the effect of visuomotor adaptation

Andrea Loftus, M.E.R. Nicholls, J.B. Mattingley, J.L. Bradshaw

Research output: Contribution to journalArticlepeer-review

55 Citations (Scopus)

Abstract

Adaptation to right-shifting prisms improves left neglect for mental number line bisection. This study examined whether adaptation affects the mental number line in normal participants. Thirty-six participants completed a mental number line task before and after adaptation to either: left-shifting prisms, right-shifting prisms or control spectacles that did not shift the visual scene. Participants viewed number triplets (e.g. 16, 36, 55) and determined whether the numerical distance was greater on the left or right side of the inner number. Participants demonstrated a leftward bias (i.e. overestimated the length occupied by numbers located on the left side of the number line) that was consistent with the effect of pseudoneglect. The leftward bias was corrected by a short period of visuomotor adaptation to left-shifting prisms, but remained unaffected by adaptation to right-shifting prisms and control spectacles. The findings demonstrate that a simple visuomotor task alters the representation of space on the mental number line in normal participants.
Original languageEnglish
Pages (from-to)1048-1058
JournalCognition
Volume107
Issue number3
DOIs
Publication statusPublished - 2008

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