Global-feature classification can be acquired more rapidly than local-feature classification in both humans and pigeons
Animal Cognition (2004) - Comment
pubmed: 15069610  doi: 10.1007/s10071-003-0193-8  issn: 1435-9448  issn: 1435-9456 

Kazuhiro Goto, A. J. Wills, Stephen E. G. Lea