Expert strategies for baby's growth and development beyond Wonder Weeks

In Part 2 of our Wonder Weeks series, we’re exploring how to support your baby’s development once a Wonder Week has passed. Is there a predictable schedule to follow, or is your baby’s crying tied to something unique? In this episode, we’ll dive into: ✨ What research says about crying and developmental stages. ✨ The cultural influences behind parenting decisions and baby care. ✨ Strategies to support your baby through challenging times, Wonder Week or not. ✨ Ways to handle stress and ensure both you and your baby thrive. Whether your baby follows the Wonder Weeks timeline or forges their own path, this episode equips you with the insights and tools you need to nurture their growth. Ready to start your parenting journey with confidence? Click below to explore Right From The Start and prepare for a smoother, more empowered first year with your baby!

Book mentioned in this episode:

Mentioned Episodes

Jump to Highlights 00:00 Introduction to the Your Parenting Mojo Podcast 01:49 Exploring the Developmental Leaps in Wonder Weeks 02:50 Critical Analysis of Leap Descriptions 12:04 Evaluating Leap Seven and Leap Eight 14:23 Parental Concerns and Cultural Influences 19:31 The Role of Social Support in Parenting 19:47 Addressing Fussy Periods and Parental Stress 44:34 The Evolution and Function of Regression Periods 51:10 Critique of Wonder Weeks' Parenting Advice 57:36 Conclusion and Final Thoughts References Alink, L. R. A., Mesman, J., van Zeijl, J., Stolk, M. N., Juffer, F., Koot, H. M., Bakermans-Kranenburg, M. J., & van IJzendoorn, M. H. (2006). The early aggression curve: Development of physical aggression in 10- to 50- month old children. Child Development, 77(4), 954-966.

Brix, N., Ernst, A., Lauridsen, L. L. B., Parner, E., Støvring, H., Olsen, J., ... & Ramlau‐Hansen, C. H. (2019). Timing of puberty in boys and girls: A population‐based study. Paediatric and Perinatal Epidemiology, 33(1), 70-78.

Feldman, D. H., & Benjamin, A. C. (2004). Going backward to go forward: The critical role of regressive movement in cognitive development. Journal of Cognition and Development, 5(1), 97-102.

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Green, B. L., Furrer, C., & McAllister, C. (2007). How do relationships support parenting? Effects of attachment style and social support on parenting behavior in an at-risk population. American Journal of Community Psychology, 40, 96-108.

Hall, E. S., Folger, A. T., Kelly, E. A., & Kamath-Rayne, B. D. (2013). Evaluation of gestational age estimate method on the calculation of preterm birth rates. Maternal and Child Health Journal, 18, 755-762.

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Jusczyk, P. W., & Krumhansl, C. L. (1993). Pitch and rhythmic patterns affecting infants' sensitivity to musical phrase structure. Journal of Experimental Psychology: Human Perception and Performance, 19(3), 627.

Krumhansl, C. L., & Jusczyk, P. W. (1990). Infants’ perception of phrase structure in music. Psychological Science, 1(1), 70-73.

Luger, C. (2018, January 8). Chelsey Luger: The cradleboard is making a comeback among tribal families. Yes! Magazine. Retrieved from https://indianz.com/News/2018/01/08/chelsey-luger-the-cradleboard-is-making.asp.

Mizuno, T., et al. (1970). Maturation patterns of EEG basic waves of healthy infants under twelve-months of age. The Tohoku Journal of Experimental Medicine, 102(1), 91-98.

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Plooij, F. X. (2020). The phylogeny, ontogeny, causation and function of regression periods explained by reorganizations of the hierarchy of perceptual control systems. In The Interdisciplinary Handbook of Perceptual Control Theory (pp. 199-225). Academic Press.

Sadurní, M., Pérez Burriel, M., & Plooij, F. X. (2010). The temporal relation between regression and transition periods in early infancy. The Spanish Journal of Psychology, 13(1), 112-126.

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Seehagen, S., et al. (2015). Timely sleep facilitates declarative memory consolidation in infants. Proceedings of the National Academy of Sciences, 112(5), 1625-1629.

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Wapner, J. (2020, April 15). Are sleep regressions real? The New York Times. Retrieved from https://www.nytimes.com/2020/04/15/parenting/baby/sleep-regression.html. [accordion] [accordion-item title="Click here to read the full transcript"] Emma 00:00 Emma. Hi, I'm Emma, and I'm listening from the UK. We all want our children to lead fulfilled lives, but we're surrounded by conflicting information and click bait headlines that leave us wondering what to do as parents. The Your Parenting Mojo podcast distills scientific research on parenting and child development into tools parents can actually use every day in their real lives with their real children. If you'd like to be notified when new episodes are released and get a free infographic on the 13 Reasons Your child isn't listening to you and what to do about each one, just head on over to yourparenting mojo.com/subscribe, and pretty soon you're going to get tired of hearing my voice. Read this intro, so come and record one yourself at your parenting mojo.com/recordtheintro. Jen Lumanlan 00:45 Hello and welcome to the second of our two part episode on the Wonder weeks on the Your Parenting Mojo podcast. In part one of this mini series, we looked at the research that underpins the concept of regression periods, which is the idea that babies go through periods where they are more fussy than usual, because they're getting ready to make a developmental leap. In that episode, we saw that, while we might assume that given the global distribution of the Wonder weeks, book and app, that the information is based on studies of 1000s of babies from many different locations, which all came to similar conclusions, that actually they're based on one single study and three attempted replications with a total of about 80 children, all of European parents who were specifically selected because they were homogenous, meaning they were white and in two parent families and had secure incomes, and the mother planned to stay home with the baby for two years and had lots of family support, if not all of those conditions were in place, then the whole thing kind of fell apart pretty fast. In this episode, I want to take a closer look at the developmental part of the leaps, rather than the fussiness. And the timing of the fussiness. I look back at the ploys earliest paper describing the leaps to see where they got the idea that leaps exist and what they mean. I wanted to understand whether, even though there might be disagreements about when the fussy periods are, we could still get some useful information out of knowing more about the developmental periods that the ploys say happen in between the fussy periods. So we're going to look at the evidence for the development that the ploys say happens in each of these periods, and also consider what, if anything, we should do with that information to support our babies and ourselves. The ploys research mostly focuses on the fussy behavior that precedes the leaps, both because it's much easier to measure than the development itself, as well as because that's perhaps understandably what parents are worried about. They want to know that what they're going through is normal and that they aren't responsible for the difficult behavior they're seeing, but in the books, they also describe the development that's apparently happening in between the fussy periods. So let's see what evidence we can find that supports their descriptions. The first thing that stands out to me in the LEAP section of the Wonder weeks website is how fuzzy the languages. Here's an example, conveniently drawn from leap one. Quote from week four, your baby enters leap one, the world of sensations. The first signals of your baby's leap will appear between weeks four to six after the due date. Learn everything about leap one in the Wonder weeks app after this leap, baby senses will undergo a sudden, rapid growth. Your baby will notice that something new and strange is happening and in their world, and they could get upset after taking leap one. Your baby will be open for new experiences, and we will notice that he or she is more sensitive. End quote, uh, what? What does this actually mean? It's like grasping at fog. There's no specific terms here that we can research ourselves, no indication that this sudden, rapid growth of baby senses that they're describing is based in research. How on earth are they measuring that babies are more open for new experiences and are also more sensitive? I went through all of the language describing the leaps and tried to find evidence supporting each of them, I looked for terms that actually meant something and ran them through Google Scholar with variations of search terms related to infant development, and I didn't find very much. After going through leap two, the ploys say that, quote, your baby stops seeing the world as one big mishmash and starts to discover patterns. End, quote, I couldn't find any specific information on pattern recognition at this age, the one paper I did find observed that the development of pattern recognition, not just in terms of visual patterns, but also patterns in language and relationships, is ongoing throughout the early years. There's no mention of a specific leap around week 10, moving on to leap three. Around 11 weeks, you may see signs of the next leap approaching. Leap three. The world of smooth transitions, your baby is acquiring yet another new skill. Smooth transitions are things, whether tones, the brightness of light or moving objects that smoothly change into something else. Smooth transitions are so natural to adults that we barely notice them anymore. For your baby, these are the most complex things they can handle, and are therefore peak experiences. It was hard to find any evidence related to this. The paper I did find was written by two authors who are both psychologists, and one is also an ophthalmologist, who showed that visual functions of symmetry, COVID, linearity, motion, depth, acuity, these are all beginning to develop from birth until they show more adult like signatures at seven to eight months with no specific shift in the 11 to 13 week window. Leap four involves grabbing objects which we can actually find evidence to support. This is a common enough milestone it shows up in developmental charts. Deploys also suggest that infants will start babbling in this period around four months, when developmental charts published by the Centers for Disease Control put this at closer to six months. So the ploys are right when they say in the Wonder weeks book that they mention their skills really are on the earliest possible end of when they might appear. I couldn't find any evidence at all for leap five on putting together the relationships between all the earlier leaps. Leap six on dividing the world into categories or groups, or LEAP seven on beginning to assemble and connect things rather than only deconstruct them. Leap eight is described in such weird language that I initially couldn't understand it. It involves the ability to observe and perform various programs. And when I put that together with the idea that the child will learn that an end goal can be achieved in different ways, I finally understood that they're talking about planning, they also pick up this idea in the LEAP nine description. Welcome to the world of principles. If your toddler has taken the leap, you will notice they are running all kinds of programs more smoothly, more naturally and more clearly. Around 64 weeks, your toddler will be a bit used to their new world and the journey of discovery can begin. Leaf nine is the leap of principles. Your toddler is more adept at handling the world of programs. As a result, they can not only imitate programs better, but also change them and create them by themselves. As a result, your little one will learn to think ahead, to reflect, to consider the consequences of their actions, to make plans and to balance them against each other. When we put these two leaps together, we can finally find solid evidence. Dr Allison gottnick and her colleagues did some work on this topic in the 1980s which is not cited in any of the Wonder weeks books which argues that the words there no and more represent baby's plans. Specifically, there encodes the success of a plan, no encodes the failure of a plan, and more encodes the repetition of a plan or a request for assistance. These words are also used to encode relationships between objects there encodes the location of objects, more encodes the similarity of objects, meaning this thing I just had and that thing over there, the same and I want more of it. And no is used to negate propositions around 18 months, children apply these words to their current concerns, right around the 64 weeks predicted by leap nine, although rather later than leap eight, where it's first discussed, the description of LEAP 10 is that you will notice that your toddler is a little more enterprising. They are behaving more maturely. They become very aware of themselves, gain a better understanding of time, begin to really enjoy music, and they treat things and toys differently. They want to do everything by themselves. And I'm thinking, Well, yes, it would be sort of surprising if, all things equal, your child wasn't behaving more maturely as time went on. A child is going to gain a better understanding of time as time goes on, as it were, from the early days in infancy, when they had no idea where you went, when you disappeared, to being able to predict when something will happen that comes on a daily basis to understanding what just a minute means, which, when we say is almost never just one minute, their understanding of time is continually evolving. I also have a video of my daughter, Karis, at about eight months, sitting on a mat and swaying in time to someone's guitar playing, clearly enjoying music. I'm not seeing anything unique in treating things and toys differently, which can happen at a variety of ages for a variety of different reasons. Holovitz brings us to how does the Wonder weeks help? Why do so many people follow this stuff I mentioned in the last episode on this topic that I ran a definitely unscientific poll in the free Your Parenting Mojo Facebook group to understand whether parents knew that they had to base the timing of the Wonder weeks on the child's gestational age when they responded to the survey. Some parents added comments about their experience with the program. Parent Anker said, we use the app, and it helped us tremendously. I have since learned there is much to criticize about the concept, but the perceived knowledge of what was happening for our baby made it easier for us to deal with the increased fussiness and difficult nights, and I really think that's at the heart of it. It's about seeing that there might be a reason why your child is...

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