Dr. Robert S. Siegler is a Professor of Cognitive Psychology at Carnegie Mellon University. He is the author of the cognitive development textbook Children’s Thinking, as well as several other books on child development such as How Children Develop, which he has written or edited. His ebooks have been published in Japanese, Spanish, French, Korean, and Portuguese, among other languages. He’s given keynote addresses at the Cognitive Development Society, the International Society for the Study of Behavioral Development, the Japanese Psychological Association, the Eastern Psychological Association, and the Conference on Human Development over the last few years.

Professor Siegler was also an Associate Editor for the journal Developmental Psychology, co-edited the 2006 Handbook of Child Psychology’s cognitive development volume, and served on the National Mathematics Advisory Panel from 2006 to 2008. Dr. Siegler was awarded the Distinguished Scientific Contribution Award by the American Psychological Association in 2005.