Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    Look, no hands: A perceptual task shows that number magnitude induces shifts of attention

    Access Status
    Fulltext not available
    Authors
    Nicholls, M.
    Loftus, Andrea
    Gevers, W.
    Date
    2008
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Nicholls, M. and Loftus, A. and Gevers, W. 2008. Look, no hands: A perceptual task shows that number magnitude induces shifts of attention. Psychonomic Bulletin & Review. 15 (2): pp. 413-418.
    Source Title
    Psychonomic Bulletin & Review
    DOI
    10.3758/PBR.15.2.413
    ISSN
    1069-9384
    URI
    http://hdl.handle.net/20.500.11937/17057
    Collection
    • Curtin Research Publications
    Abstract

    The mental representation of numbers along a line oriented left to right affects spatial cognition, facilitating responses in the ipsilateral hemispace (the spatial–numerical association of response codes [SNARC] effect). We investigated whether the number/space association is the result of an attentional shift or response selection. Previous research has often introduced covert left/right response cues by presenting targets to the left or the right. The present study avoided left/right cues by requiring forced choice upper/lower luminance discriminations to two mirror-reversed luminance gradients (the grayscale task). The grayscale stimuli were overlaid with strings of (1) low numbers, (2) high numbers, and (3) nonnumerical characters. In Experiment 1, 20 dextrals judged the number’s magnitude and then indicated whether the upper/lower grayscale was darker. Results showed leftward and rightward attentional biases for low and high numbers, respectively. Demands to process numbers alonga left/right line were made less explicit in Experiment 2 (N 5 18 dextrals), using (1) a parity judgment and (2) arbitrary linguistic labels for top/bottom. Once again, a spatial congruency effect was observed. Because the response (up/down) was orthogonal to the dimension of interest (left/right), the effect of number cannot be attributed to late-stage response congruencies. This study required unspeeded responses to stimuli presented in free vision, whereas other experiments have used speeded responses. Understanding the time course of number–space effects may, therefore, be important to the debate associated with response selection.

    Related items

    Showing items related by title, author, creator and subject.

    • Isolation and genetic characterization of mother-of-snow-white, a maternal effect allele affecting laterality and lateralized behaviors in zebrafish
      Domenichini, Alice; Dadda, M.; Facchin, L.; Bisazza, A.; Argenton, F. (2011)
      In the present work we report evidence compatible with a maternal effect allele affecting left-right development and functional lateralization in vertebrates. Our study demonstrates that the increased frequency of reversed ...
    • Pseudoneglect for the bisection of mental number lines
      Loftus, Andrea; Nicholls, M.; Mattingley, J.; Chapman, H.; Bradshaw, J. (2009)
      Patients with unilateral neglect of the left side bisect physical lines to the right whereas individualswith an intact brain bisect lines slightly to the left (pseudoneglect). Similarly, for mental numberlines, which are ...
    • Hearing abilities and sound reception of broadband sounds in an adult Risso’s dolphin (Grampus griseus)
      Mooney, T.; Yang, W.; Yu, H.; Ketten, Darlene; Jen, I. (2015)
      © 2015, Springer-Verlag Berlin Heidelberg. While odontocetes do not have an external pinna that guides sound to the middle ear, they are considered to receive sound through specialized regions of the head and lower jaw. ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.