I’m not a fan of multi-tasking bar one exception. It involves language acquisition.
When you listen and read (ListenRead) this is a form of multi-tasking. But I want to describe something a little different.
Recently I scanned my (HP) book for sample sentences. At the same time I listened. However, since I scanned much more quickly than the narrator spoke, the text did not match. I discovered myself working on different chapters.