Yet as I mentioned earlier, the impact of redshirting is not as clear-cut as it sounds. First, much of the research on redshirting is pretty old—some of the key studies I cited relied on cohorts of kids who were redshirted in the late ’70s or early ’80s, and kindergarten has changed a lot since then. Redshirting has also become more common over the years, although it started becoming popular as early as the 1990s. Second, redshirted kids are usually vastly different from non-redshirted kids before they even get to school, so it can be difficult to separate the effects of redshirting from these fundamental differences. Redshirted kids these days are most likely to be boys who come from affluent families—one study from California reported that parents who redshirt their kids earn, on average, 40 percent more than those who don’t—because, as mentioned earlier, low-income parents typically can’t afford to pay for another year of preschool. (In the 2006 study involving 15,000 kids, the redshirted kids’ families had lower incomes than the non-redshirted kids’ families—another reason why old studies aren’t necessarily applicable today.) So when researchers compare redshirted kids to non-redshirted kids, they’re often comparing socio-economic apples and oranges.
There’s also the fact that kids are sometimes redshirted because they have behavior or learning problems that parents mislabel as immaturity—I’m sure Kalee’s tendency to throw chairs at adults will go away once she turns 6, so we’ll just wait a year. This could explain why redshirted kids often need special education services and also why they’re more likely to drop out of school and not go to college. In other words, redshirting might not actually increase the risk of these problems—it may just be a sign of existing problems. Yet redshirting these types of kids “can in fact make the problems worse, in that the child’s access to support is delayed as the family and school wait for maturity to kick in,” Graue says.
So, is there any research that suggests redshirting is helpful? Yes—but again, this research does not actually tell us much about redshirting. Elizabeth Dhuey, an economist at the University of Toronto at Scarborough, has published a number of studies suggesting that the older kids are in a class, the better they fare academically, the more leadership roles they have in high school, and the more likely they are to attend elite universities—pretty much exactly the opposite of what the redshirting studies show. But even though her work has been used to support redshirting, “my findings relate only to a child’s age relative to their classmates—not the act of redshirting,” Dhuey explains. “These are different things altogether.” Because Dhuey’s work pools the impact of natural age differences across the school year—comparing how kids born in May fare to kids born in December—it’s dishonest to cite her work as evidence that redshirting itself is helpful, even though there were probably some redshirters in her samples.
Ultimately, at the core of the argument over redshirting are questions about how children learn. Do they develop social and cognitive skills according to automatic internal clocks that are unaffected by environmental influences—which would suggest that kids become ready to learn on their own time? Or do kids develop key learning skills based on their interactions with others and how stimulating their environments are—which would suggest that redshirting harms the children who could benefit from kindergarten the most? No one knows for sure.
At this point, I know you’re pulling your hair out and just want to know: So what should I do when it comes time to enroll my kid in kindergarten? I asked this of Deborah Stipek, the former dean of the Stanford Graduate School of Education, who has studied redshirting and relative age effects. She says that parents should consider more than just their child when it comes time to make enrollment decisions—they need to consider their kindergarten, too. “I usually suggest that parents visit the kindergarten, sit in the back of the room, and envision their child in that setting, because there are some kindergartens where children would be dying if they had poor self-regulation, whereas other kindergartens are much more tolerant and much more amenable to kids who need extra support,” she says. “I think it really depends on the kid in the context of what the educational program demands.”
I have no idea what I will do if my son, who has a late spring birthday, seems unready for kindergarten when he’s 5. I sure as hell don’t want to pay for an extra year of preschool, and my instincts also tell me that I’d prefer for him to be challenged by school—not too much, but enough—than be bored by it. If he had a late summer birthday, I’d rather that he be surrounded by slightly more mature peers than slightly less mature peers. “It's like tennis partners—you want to pick someone who is better than you,” says Sam Wang, a Princeton neuroscientist and a co-author of the book Welcome to Your Child’s Brain.
David Deming, the Harvard education economist who published the 2008 review on redshirting, agrees. He shared an illustrative example about what recently happened to his 4-year-old daughter, one of the youngest in her preschool class. She had come home complaining that her friend, who was almost 5, could already go all the way across the monkey bars. His daughter, on the other hand, could only get to the second bar. “I told her that if she keeps practicing, she will eventually get better,” he says. “She got to the third bar this morning.” If she were the oldest, automatically better at so many things than her friends, would she set as many difficult goals for herself? Would she learn as much about patience and perseverance? Maybe not.
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