Would love to see the raw data, but from their own plots you can see that 2017, 2018 and 2019 show a trend that would make the 2020 and 2021 data consistent with the trend.
As they show data comparing 2020 and 2021 to the previous years, they could have shown a matrix to compare year over year across the data.
I will wait for someone to look at the raw data and peer review the paper before jumping to conclusions.
I'm not discounting that the COVID-19 pandemic has had an impact on child development, I would be surprised if it didn't, but I expected a bit more rigorous data analysis from this paper.
As they show data comparing 2020 and 2021 to the previous years, they could have shown a matrix to compare year over year across the data.
I will wait for someone to look at the raw data and peer review the paper before jumping to conclusions.
I'm not discounting that the COVID-19 pandemic has had an impact on child development, I would be surprised if it didn't, but I expected a bit more rigorous data analysis from this paper.