Monkeys (Macaca mulatta and Cebus apella) track, enumerate, and compare multiple sets of moving items.

Monkeys (Macaca mulatta and Cebus apella) and Human Adults and Children (Homo sapiens) Enumerate and Compare Subsets of Moving Stimuli Based on Numerosity

(2011). Monkeys (Macaca mulatta and Cebus apella) and human adults and children (Homo sapiens) enumerate and compare subsets of moving stimuli based on numerosity. Frontiers in Psychology, 2:61. Within the set of studies that involve judgments between sets of stimuli, however, there must be a distinction made between those studies that require animals to discriminate the number of items from th...

Monkeys (Macaca Mulatta and Cebus Apella) and Human Adults and Children (Homo Sapiens) Compare Subsets of Moving Stimuli Based on Numerosity

Two monkey species (Macaca mulatta and Cebus apella) and human children and adults judged the numerousness of two subsets of moving stimuli on a computer screen. Two sets of colored dots that varied in number and size were intermixed in an array in which all dots moved in random directions and speeds. Participants had to indicate which dot color was more numerous within the array. All species p...

Generalization hypothesis of abstract-concept learning: learning strategies and related issues in Macaca mulatta, Cebus apella, and Columba livia.

The generalization hypothesis of abstract-concept learning was tested with a meta-analysis of rhesus monkeys (Macaca mulatta), capuchin monkeys (Cebus apella), and pigeons (Columba livia) learning a same/different (S/D) task with expanding training sets. The generalization hypothesis states that as the number of training items increases, generalization from the training pairs will increase and ...

Visual Processing Speed in Capuchin Monkeys (Cebus apella) and Rhesus Macaques (Macaca mulatta)

We thank Michael Beran for his advice and discussion throughout the course of this project and for providing the software used in these experiments. SFB was funded by NSF HSD grant (SES 0729244) and NSF CAREER award (SES 0847351). We thank the animal care and enrichment staff for maintaining the health and wellbeing of the monkeys. Correspondence concerning this article should be addressed to D...

Journal of Experimental Psychology: Animal Learning and Cognition Do You See What I See? A Comparative Investigation of the Delboeuf Illusion in Humans (Homo sapiens), Rhesus Monkeys (Macaca mulatta), and Capuchin Monkeys (Cebus apella)