Visual nesting of stimuli affects rhesus monkeys' (Macaca mulatta) quantity judgments in a bisection task
Attention Perception & Psychophysics (2013) - Comment
pubmed: 23709063  doi: 10.3758/s13414-013-0474-5  issn: 1943-393x  issn: 1943-3921 

Michael J. Beran, Audrey E. Parrish