However, his work has been influential in shaping the field of animal cognition and has been cited in numerous books and articles. His major research achievements include:
* Demonstrating that chimpanzees possess the cognitive abilities for abstract thought: Premack and his colleagues developed a language system for chimpanzees, using symbols to represent objects, actions, and concepts. This allowed them to study chimpanzees' understanding of abstract ideas like "same," "different," "bigger," and "smaller."
* Investigating the social intelligence of chimpanzees: Premack's research showed that chimpanzees have complex social relationships and exhibit social behaviors similar to humans, such as cooperation, deception, and empathy.
* Developing innovative methodologies for studying animal cognition: Premack's pioneering work led to the development of novel techniques for studying animal intelligence, paving the way for further research in this field.
While Premack may not have authored full-length books, his academic papers and the impact of his research are widely recognized in the field of animal cognition.