I am Professor of Psychology and the Co-Director of the Language Research Center of Georgia State University in Atlanta, GA.My research interests focus primarily on numerical cognition in nonhuman primates. In particular, I study counting and other mathematical skills in the chimpanzees, capuchin monkeys, and rhesus monkeys at the Language Research Center. However, I also have conducted studies on delay of gratification, metacognition, long-term memory, language acquisition, planning, and object permanence in apes and monkeys.My research is supported by funding from the National Institute of Child Health and Human Development, the National Science Foundation, and the European Science Foundation.Specialties: Comparative Learning and Behavior; Animal Cognition; Numerical Cognition; Arithmetic; Delay of Gratification; Self-Control; Metacognition; Memory; Behavioral Primatology