As these books tend to be short on footnotes, I couldn’t actually track down any such study. And what a study it would have to be: large-scale, “longitudinal,” intensely observational, randomized. Otherwise, how would we really know how much time children had spent in playpens (self-reports tend to be biased), what sort of households the children lived in, not to mention what might have occurred in the years between the time spent in playpens and the time of the reading and writing tests at age 7 or 8? Which left me wondering: Is the fear of playpens all hype? Just a hysterical outcropping of our anxious style of modern parenting?
If you plan to have your little one sleep in your room or your baby has a smaller room you might want to try a pack 'n play that has a smaller footprint. This one acts as a bassinet when your baby is in the newborn stage but can convert to a mini crib when they get older. This model only holds up to 30 pounds but for some that can be well past the age of two. What's also great about this is it looks more like a permanent crib instead of something portable so if you plan to use this all the time it has more of a design aesthetic.