The following is part of the text I recently came across and have had trouble tracing to a valid, reliable source. Now, regardless of which source it comes from, could anyone please give me his/her opinion(s) on the writer's word choice in using "incredible," most probably as an idea which is meant to contrast with "pleasant"? I'd appreciate it if you put your opinions in clear and distinguishable terms as I need to decide whether to include the text in the book I'm trying to compile. Thanks.
Studying with the TV or radio on adversely affects your ability to absorb what you're trying to learn. The same goes for any background music which competes for your attention. Choose music you find pleasant, not incredible.