Document Type

Article

Publication Date

2012

Comments

This article was originally published in the journal Frontiers in Comparative Psychology. Copyright © 2012 Beran. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in other forums, provided the original authors and source are credited and subject to any copyright notices concerning any third-party graphics etc.

The version of record is available here with the permission of the author.

Creative Commons License


This work is licensed under a Creative Commons Attribution 3.0 License.