Baby Quinn’s attention to a song on an iPod decreased after her mother played it several times. When her mother played a different song, Quinn’s attention increased. This is an example of

Recovery

Explanation:

Recovery is the art of getting interest in an activity that was lost due to an activity that made it so. People get bored of doing the same thing or listening to the same thing every time and overtime they loose interest and stop or would just be listening for the sake of it, but when the activity isn't stereotypical, they would always have interest. Baby Quinn started recovering her taste for music when her mother switched the song to another than the regular which was killing her interest.