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
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.
|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|
|Publisher:||Apa American Psychological Association|