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'''''The Wonder Weeks: A Stress-Free Guide to Your Baby's Behavior''''' is a book with advice to parents about child development by [[Biological_anthropology|physical anthropologist]] Hetty van de Rijt and [[Ethology|ethologist]] and [[Developmental psychology|developmental psychologist]] [[Frans Plooij]]. Xaviera Plas-Plooij is a third author of recent editions. It was first published in English in 2003<ref>{{Cite book |last=Vanderijt |first=Hetty |title=The wonder weeks: how to turn your baby's 8 great fussy phases into magical leaps forward |last2=Plooij |first2=Frans X. |date=2003 |publisher=Rodale |isbn=978-1-57954-645-8 |location=Emmaus, Pa}}</ref> as the translation of the [[Dutch language|Dutch]] book ''Oei, ik groei!'' (literal translation: Ai, I'm growing!), which was first published in 1992. The 6th edition in 2019<ref name=":1">{{Cite book|url=https://books.google.com/books?id=qgrGAQAACAAJ&q=wonder+weeks|title=The Wonder Weeks: A Stress-Free Guide to Your Baby's Behavior|last1=Rijt|first1=Hetty van de|last2=Plooij|first2=Frans X.|last3=Plas-Plooij|first3=Xaveira|date=September 2019|publisher=W. W. Norton|isbn=978-1-68268-427-6|location=New York|pages=464|language=en}}</ref> includes a chapter on sleep.<ref name=Verhoeven>{{cite news |last= Verhoeven |first= Eymeke |date= 2018-03-07 |title= Je kind loopt nog niet? Maakt niet uit |trans-title=Your child isn't walking yet? It doesn't matter |url=https://www.nd.nl/leven/leven/579548/je-kind-loopt-nog-niet-maakt-niet-uit |url-status= |language=nl |issue= |publisher= |work=Nederlands Dagblad |location= |archive-url= |archive-date= |access-date=2024-02-25 |via= |quote=}}</ref> It claims that the [[cognitive development]] of babies occurs in predictable stages.<ref name=Verhoeven/> However, experts in child development have disputed the research.<ref name=":2">{{Cite news |last=Wapner |first=Jessica |date=2020-04-16 |title=Are Sleep Regressions Real? |language=en-US |work=The New York Times |url=https://www.nytimes.com/2020/04/15/parenting/baby/sleep-regression.html |url-status=live |access-date=2023-12-17 |archive-url=https://web.archive.org/web/20230605155926/https://www.nytimes.com/2020/04/15/parenting/baby/sleep-regression.html |archive-date=2023-06-05 |issn=0362-4331}}</ref> The publisher has produced a [[mobile app]] based on the book.<ref>{{Cite news|url=https://www.thewonderweeks.com/about-the-wonder-week-app/|title=The Wonder Weeks App|work=The Wonder Weeks|access-date=2017-08-27|language=en-US}}</ref>
'''''The Wonder Weeks: A Stress-Free Guide to Your Baby's Behavior''''' is a book with advice to parents about child development by [[Biological_anthropology|physical anthropologist]] Hetty van de Rijt and [[Ethology|ethologist]] and [[Developmental psychology|developmental psychologist]] [[Frans Plooij]]. Xaviera Plas-Plooij is a third author of recent editions. It was first published in English in 2003<ref>{{Cite book |last=Vanderijt |first=Hetty |title=The wonder weeks: how to turn your baby's 8 great fussy phases into magical leaps forward |last2=Plooij |first2=Frans X. |date=2003 |publisher=Rodale |isbn=978-1-57954-645-8 |location=Emmaus, Pa}}</ref> as the translation of the [[Dutch language|Dutch]] book ''Oei, ik groei!'' (literal translation: Ai, I'm growing!), which was first published in 1992. The 6th edition in 2019<ref name=":1">{{Cite book|url=https://books.google.com/books?id=qgrGAQAACAAJ&q=wonder+weeks|title=The Wonder Weeks: A Stress-Free Guide to Your Baby's Behavior|last1=Rijt|first1=Hetty van de|last2=Plooij|first2=Frans X.|last3=Plas-Plooij|first3=Xaveira|date=September 2019|publisher=W. W. Norton|isbn=978-1-68268-427-6|location=New York|pages=464|language=en}}</ref> includes a chapter on sleep.<ref name=Verhoeven>{{cite news |last= Verhoeven |first= Eymeke |date= 2018-03-07 |title= Je kind loopt nog niet? Maakt niet uit |trans-title=Your child isn't walking yet? It doesn't matter |url=https://www.nd.nl/leven/leven/579548/je-kind-loopt-nog-niet-maakt-niet-uit |url-status= |language=nl |issue= |publisher= |work=Nederlands Dagblad |location= |archive-url= |archive-date= |access-date=2024-02-25 |via= |quote=}}</ref> It claims that the [[cognitive development]] of babies occurs in predictably timed stages.<ref name=Verhoeven/> However, experts in child development have disputed the research.<ref name=":2">{{Cite news |last=Wapner |first=Jessica |date=2020-04-16 |title=Are Sleep Regressions Real? |language=en-US |work=The New York Times |url=https://www.nytimes.com/2020/04/15/parenting/baby/sleep-regression.html |url-status=live |access-date=2023-12-17 |archive-url=https://web.archive.org/web/20230605155926/https://www.nytimes.com/2020/04/15/parenting/baby/sleep-regression.html |archive-date=2023-06-05 |issn=0362-4331}}</ref> The publisher has produced a [[mobile app]] based on the book.<ref>{{Cite news|url=https://www.thewonderweeks.com/about-the-wonder-week-app/|title=The Wonder Weeks App|work=The Wonder Weeks|access-date=2017-08-27|language=en-US}}</ref>


== Claims ==
== Claims ==

Revision as of 15:08, 14 March 2024

The Wonder Weeks: A Stress-Free Guide to Your Baby's Behavior
AuthorFrans X. Plooij
Hetty Vanderijt
SubjectInfant development
Publication date
1992
ISBN978-94-91882-16-6

The Wonder Weeks: A Stress-Free Guide to Your Baby's Behavior is a book with advice to parents about child development by physical anthropologist Hetty van de Rijt and ethologist and developmental psychologist Frans Plooij. Xaviera Plas-Plooij is a third author of recent editions. It was first published in English in 2003[1] as the translation of the Dutch book Oei, ik groei! (literal translation: Ai, I'm growing!), which was first published in 1992. The 6th edition in 2019[2] includes a chapter on sleep.[3] It claims that the cognitive development of babies occurs in predictably timed stages.[3] However, experts in child development have disputed the research.[4] The publisher has produced a mobile app based on the book.[5]

Claims

According to the book, a baby should go through 10 predictable jumps or "leaps" in their cognitive development during the two years, with 8 in just the first year, counted from the due date if the child was premature.[6] These jumps consist of two phases; A phase where the baby is generally unhappy, followed by a period where the baby is generally happy, due to discovering new things with the newly gained cognitive skills. The "leaps" are predicted to occur at 5, 8, 12, 19, 26, 37, 46, 55, 64 and 75 weeks old.[2]

Plooij's initial study was based on a survey of the mothers of 15 babies showing periods of greater and lesser fussiness.[7][4] However, a follow up study by his former graduate student, with 28 infants and biological measure of stress rather than survey data, failed to find any predictable pattern of stress.[8][4] A third study, with 18 babies, also found an effect on fussiness, but again based on maternal report.[9][10][4] None of the studies show evidence that the periods of fussiness are related to changes in cognitive development, a key component of the theory.[4]

Controversy

A follow-up study by Plooij's PhD student, Carolina de Weerth, examined the claims of the book. She tested both behaviour and cortisol levels and failed to find any evidence of greater fussiness or higher cortisol levels corresponding to the leaps,[8][11] though this might be due to inadequate sample size.[4] According de Weerth, Frans X Plooij tried to pressure her into not publishing the study.[11][12][4] Plooij disputes this account.[4] The controversy that ensued led to Plooij's departure from academia.[11][13][14]

References

  1. ^ Vanderijt, Hetty; Plooij, Frans X. (2003). The wonder weeks: how to turn your baby's 8 great fussy phases into magical leaps forward. Emmaus, Pa: Rodale. ISBN 978-1-57954-645-8.
  2. ^ a b Rijt, Hetty van de; Plooij, Frans X.; Plas-Plooij, Xaveira (September 2019). The Wonder Weeks: A Stress-Free Guide to Your Baby's Behavior. New York: W. W. Norton. p. 464. ISBN 978-1-68268-427-6.
  3. ^ a b Verhoeven, Eymeke (2018-03-07). "Je kind loopt nog niet? Maakt niet uit" [Your child isn't walking yet? It doesn't matter]. Nederlands Dagblad (in Dutch). Retrieved 2024-02-25.
  4. ^ a b c d e f g h Wapner, Jessica (2020-04-16). "Are Sleep Regressions Real?". The New York Times. ISSN 0362-4331. Archived from the original on 2023-06-05. Retrieved 2023-12-17.
  5. ^ "The Wonder Weeks App". The Wonder Weeks. Retrieved 2017-08-27.
  6. ^ Plooij, Frans. "Groeisprongen". oeiikgroei. Retrieved 14 June 2015.
  7. ^ Van De Rijt-Plooij, Hedwig H.C.; Plooij, Frans X. (July 1992). "Infantile regressions: Disorganization and the onset of transition periods". Journal of Reproductive and Infant Psychology. 10 (3): 129–149. doi:10.1080/02646839208403946. ISSN 0264-6838.
  8. ^ a b de Weerth, C.; van Geert, P. (1998-03-01). "Emotional instability as an indicator of strictly timed infantile developmental transitions". British Journal of Developmental Psychology. 16 (1): 15–44. doi:10.1111/j.2044-835X.1998.tb00748.x. ISSN 2044-835X.
  9. ^ Sadurní, M.; Rostan, C. (2002). "Regression periods in infancy: A case study from Catalonia". Spanish Journal of Psychology. 5 (1): 36–44. doi:10.1017/s1138741600005813. hdl:10256/1720. PMID 12025364.
  10. ^ Sadurní, M.; Rostan, C. (2003). "Reflections on regression periods in the development of Catalan infants". In Heimann, Mikael (ed.). Regression periods in human infancy. Mahwah, NJ: Erlbaum. pp. 7–22. ISBN 0-8058-4098-2.
  11. ^ a b c Cite error: The named reference trouw was invoked but never defined (see the help page).
  12. ^ "'Oei, ik groei!' leidt tot bittere ruzie van wetenschappers". Trouw (in Dutch). Archived from the original on 2017-08-27. Retrieved 2017-08-27. zeer onfatsoenlijk
  13. ^ Dirks, Bart (January 13, 1997). "Hoogleraar woedend over weerlegging theorie". Algemeen Dagblad (AD). Retrieved 14 June 2015.
  14. ^ Dirks, Bart (1998-01-14). "Positie Plooij onhoudbaar na openlijke kritiek op oud-promovenda; Auteur 'Oei, ik groei' ontslagen als hoogleraar". Volkskrant. Retrieved 14 June 2015.
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