Those that are ' more serious ' possess more knowledge about the activity ( Wann & Brandscombe , 1995 ) .
Those that are ' more serious ' continue to gain knowledge to increase performance standards ( Stebbins , 1982 ) .
Those that are ' more serious ' possess more knowledge about the activity ( Wann & Brandscombe , 1995 ) and continue to gain knowledge to increase performance standards ( Stebbins , 1982 ) .