White Rose University Consortium logo
University of Leeds logo University of Sheffield logo York University logo

Effects of varying stimulus size on object recognition in pigeons

Peissig, J.J., Kirkpatrick, K., Young, M.E., Wasserman, E.E. and Biederman, I. (2006) Effects of varying stimulus size on object recognition in pigeons. Journal of Experimental Psychology: Animal Behavior Processes, 32 (4). pp. 419-430. ISSN 0097-7403

Full text not available from this repository.


The authors investigated the pigeon's ability to generalize object discrimination performance to smaller and larger versions of trained objects. In Experiment 1, they taught pigeons with line drawings of multipart objects and later tested the birds with both larger and smaller drawings. The pigeons exhibited significant generalization to new sizes, although they did show systematic performance decrements as the new size deviated from the original. In Experiment 2, the authors tested both linear and exponential size changes of computer-rendered basic shapes to determine which size transformation produced equivalent performance for size increases and decreases. Performance was more consistent with logarithmic than with linear scaling of size. This finding was supported in Experiment 3. Overall, the experiments suggest that the pigeon encodes size as a feature of objects and that the representation of size is most likely logarithmic.

Item Type: Article
Institution: The University of York
Academic Units: The University of York > Psychology (York)
Depositing User: York RAE Import
Date Deposited: 04 Jun 2009 08:23
Last Modified: 04 Jun 2009 08:23
Published Version: http://dx.doi.org/10.1037/0097-7403.32.4.419
Status: Published
Publisher: Apa American Psychological Association
Identification Number: 10.1037/0097-7403.32.4.419
URI: http://eprints.whiterose.ac.uk/id/eprint/6664

Actions (repository staff only: login required)