Bör man räkna med en födelsedagseffekt? : En studie om sambandet mellan elevers födelsemånad och slutbetyg i årskurs nio inom ämnet matematik, samt en undersökning om påverkansfaktorer inom ämnet.

The aim of this study was to examine if there was a relative age effect in students grade in mathematics. The study was built on regression analysis and Spearman rho on student’s month of birth and their grades. It was found that there is a relative age effect in the student’s grades. The study discusses why we can find a relative age effect in student’s results in year nine. The study also discusses how the relative age effect can be diminished. The aim was also to explore what teachers think influence their student’s results in mathematics. Through a web survey teachers are given eleven factors to categorize as either none, low, medium or high impact on students study results in mathematics. Among these factors was whether student’s birth month can influence their results. Here the study shows discrepancies between what the teacher thinks and the experts. It also discusses whether educational research results can be transferred between countries.