MONDAY, April 4 (HealthDay News) -- A preliminary study of American kids suggests a connection between listening to pop music and suffering from major depressive disorder. But, before you pull the battery from your child’s MP3 player, know that the study did not establish a cause-and-effect relationship. And there was no clear indication whether kids who were predisposed to depression were more strongly drawn to music or, instead, faced a greater risk for depression as a result of their music exposure.