Frans X. Plooij studied behavioral biology in the Netherlands in Amsterdam, Nijmegen, and Groningen, where he received his Ph.D. in 1980. He is a full member of several international, scientific societies including the New York Academy of Sciences. Together they studied infant development in free-living chimpanzees with Dr. Jane Goodall in the Gombe National Park, Tanzania, East Africa. Dr. Plooij is director of the International Research-institute on Infant Studies (IRIS) at Arnhem, and president of Kiddy World Promotions B.V. Hetty van de Rijt studied Educational Psychology at the University of Nijmegen, the Netherlands and obtained her Ph.D. in Physical Anthropology at the University of Cambridge, England. At the University of Amsterdam, Dr. van de Rijt studied the development of human babies in their home environment. As lead author with her husband as co-author, she wrote the best-selling parenting book The Wonder Weeks, which has been published in twelve languages, from the USA to Japan.
"This is a very practical and entertaining window into the baby's first year and a half. van de Rijt and Plooij have observed and found the vulnerable times in an infant's development that I independently came to in my book Touchpoints (Perseus). The authors' observations and practical suggestions are wonderful." T. Berry Brazelton, M.D., professor emeritus, Harvard Medical School. "Anyone who deals with infants and young children will want to read 'The Wonder Weeks.' This book will open parents' eyes to aspects of their children's growth, development, changing behavior, and emotional responsiveness that they might otherwise not notice or find puzzling and distressing." Catherine Snow, Ph.D., Shattuck Professor of Education, Harvard Graduate School of Education. "The Wonder Weeks: One of our own personal favorites!" The Bump editors Featured in AWHONN magazine Healthy Mom & Baby: "Breakthrough science reveals the true reasons of fussiness and weeks of wonders" "I had no clue about The Wonder Weeks with my first daughter. Having this knowledge now has saved my sanity! Mental leaps aren't always the easiest for both baby and parent, but I'm armed with the tools to help my daughter through these changes, and it helps to quell my mind as to what could be causing her so much fuss. It's normal. "Babyzone, courtesy of Disney "A must for every parent." Washington Times "Finally figured out one phase of the baby's developments to be blind-sided by an entirely new one? This book will get you through those transition times" Examiner.com