The authors review spontaneous manipulation and spatial problem solving by capuchin
monkeys to illuminate the nature of relational reasoning (wherein two or more elements of a …

In the past few decades, there has been an increase in the number of zoo‐based
touchscreen studies of animal cognition around the world. Such studies have contributed to …

Nonhuman primates provide useful models for studying a variety of medical, biological, and
behavioral topics. Four years of joystick-based automated testing of monkeys using the …

Two rhesus monkeys (Macaca mulatta) learned that the arabic numerals 0 through 9
represented corresponding quantities of food pellets. By manipulating a joystick, the …

Studying visual illusions is critical to understanding typical visual perception. We
investigated whether rhesus monkeys (Macaca mulatta) and capuchin monkeys (Cebus …

Two rhesus monkeys selected the larger of two sequentially presented sets of items on a
computer monitor. In Experiment 1, performance was related to the ratio of set sizes, and the …

In neurophysiological studies with awake non-human primates (NHP), it is typically
necessary to train the animals over a prolonged period of time on a behavioral paradigm …

Animal metacognition is an active, growing research area, and one part of metacognition is
flexible information-seeking behavior. In Roberts et al.(2009), pigeons failed an intuitive …

Devising new and more efficient protocols to analyze the phenotypes of non-human
primates, as well as their complex nervous systems, is rapidly becoming of paramount …

Teaching nonhuman primates the complex cognitive behavioral tasks that are central to
cognitive neuroscience research is an essential and challenging endeavor. It is crucial for …