AUTHOR=Baldassarre Gianluca , Stafford Tom , Mirolli Marco , Redgrave Peter , Ryan Richard M. , Barto Andrew TITLE=Intrinsic motivations and open-ended development in animals, humans, and robots: an overview JOURNAL=Frontiers in Psychology VOLUME=5 YEAR=2014 URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2014.00985 DOI=10.3389/fpsyg.2014.00985 ISSN=1664-1078