the first of four questions they sought out to determine was if high quality males, those with a higher fitness, have a higher percentage performance time in their bouts compared to lower quality males, with percentage performance time meaning the percentage of time during which song was being produced. the second was if high quality males sing longer bouts than low quality males. the third answer they sought was whether the percentage performance time changed or stayed the same during a bout. the final question they sought the answer to was whether or not the percentage performance time changed after a bird switches song types.