Angelika Schaffrath Rosario, Robert Koch-Institute, Berlin, Germany
4 July 2006
I wonder whether a study with 11 children in an age range of 9 years can give any reliable quantitative information on neurocognitive function. It's no wonder that there are no significant results with this small sample size. Also, there seems to be no clear design in this study.
Doubts on statistical validity
4 July 2006
I wonder whether a study with 11 children in an age range of 9 years can give any reliable quantitative information on neurocognitive function. It's no wonder that there are no significant results with this small sample size. Also, there seems to be no clear design in this study.
Competing interests
None declared