Notational analysis is a convenient method it can cause issues with reliability and validity .
This is dependent on several factors including , how many people are observing , the viewing angle and their experience in what they are analysing ( Barris and Button , 2008 ) .
Although notational analysis is a convenient method it can cause issues with reliability and validity , this is dependent on several factors including , how many people are observing , the viewing angle and their experience in what they are analysing ( Barris and Button , 2008 ) .