The comparative study of behavior and cognition in human and non-human primates enables to better understand developmental, cognitive and adaptive processes in different species. A comparative study of cognition and behavior, also allows further insight into major switching points in the phylogeny of primates. Our research group puts special emphasis on examining the processes by which primates acquire and process information coming from physical and social stimuli. In particular, we examine what kind of information is picked up, which factors facilitate the acquisition of new types of behavior, and the cognitive and social processes underlying the transmission of new behavior in non-human primates.