The control group started both dancing lessons and choir singing in the beginning of third grade and that same fall the experimental group lost many of their music lessons because of their music teacher´s long term illness.
Samanburðarhópurinn hóf bæði þátttöku í dansi og kórstarfi í upphafi 3. bekkjar, og á sama tíma missti tónlistarhópurinn úr tónlistarþjálfuninni vegna veikindaforfalla tónmenntakennara.