After school, you watch your friend Katie run to a truck as soon as she hears the truck's music playing. Later, you find out the truck is the ice cream vendor's vehicle. How would a behaviorist interpret Katie's running to the truck? Katie remembers the pattern of the music and knows the truck is too far away to reach unless she runs. Katie uses the music as a test of her biological reflexes. Katie has been conditioned to the music and has associated the musical truck with serving ice cream. Katie feels empathetic for the man driving the ice cream truck in such hot weather and wants to take him a drink of water.