> Interestingly, the research didn’t show significant improvements in cognitive ability; the phone ban group showed a modest 3% boost in working memory, and there were no improvements in sustained attention. Researchers suggest that these results might mean that changes in cognitive ability could take longer than the study period of 21 days to materialise.
Notice how they had decided beforehand what they were going to find out, and are making an excuse here for not finding part of it.
Notice how they had decided beforehand what they were going to find out, and are making an excuse here for not finding part of it.