Chew gum,score high in MATHS

I don't really believe it too. That is why we have to look at the study that was done really carefully. Firstly, the inclusion criteria of the study is a must to look at. How are the people for the study being roped in? Are students randomly placed into the different groups of the study (to minimize possibility that all the students good in maths are placed into one group, hence bias is there)? Is the sample size big enough ie. enough people in the study to ensure the results are significant? Secondly, we need to look at the validity of the claim. What is the statistical method they used for the study? Is the method reliable? Is there enough evidence to claim that there is a statistically significant difference? We also need to be aware that the researchers might be biased themselves. Sometimes they want something far-fecthed to work so badly that they gear a study to work in their favor. That is why studies done need to be peer-reviewed to ensure that it is critically judged and put through the test before being accepted as valid.