Researchers actually found something that was already known for some time.  20 years ago I remember reading an old book about learning techniques.  One of the techniques in it, and one that I use for myself and my kids is to sound out the answer to questions in various tones.  For instance:<p>8 times 6 equals FORTY EIGHT (yelled).  
8 times 6 equals forty eight (whispered).
8 times 6 equals forty eight (monotone).
etc...<p>It does work, but it frustrates me that these researchers think this is something new.