These comments point out the problems with this study. First, apparently most pediatricians don't know child safety rules. Second, the study wasn't also done on parents. For all we know, parents are just as bad or worse than grandparents when it comes to child safety. After all, grandparents succeeded at least once in raising a child in the past while new parents don't have any sort of track record. But the headline is about grandparents' "out of date" child raising methods.Although the study focused on grandparents, Adesman [study author] and Altmann [a pediatrician] both recognize that other groups can make the same mistakes. In a previous study, Adesman surveyed pediatricians (PDF) and found that only 24% answered all 12 questions about basic safety information correctly.In her practice, Altmann hears many of these health myths from new parents and grandparents alike."I'd love to see this study redone and given to the parents; I think people would be surprised," she said.
Another assumption in the linked article is that "more grandparents are taking on child care roles." Is this really true? Grandparents have always helped with parenting and have always taken on the task of raising children when parents are unable to. There may be a larger role for grandparents today because they are in better health on average than in the past, but it isn't clear that a larger proportion of children are being raised by grandparents (and accurate data probably doesn't exist).
All of which brings up the irony of modern child safety rules. If we total up all child safety advice, from car seats and seat belts to plastic caps on electrical outlets, one wonders how any children actually lived to adulthood in the past.