I really like this experiment that was done.  I first saw it in 2011 on YouTube by Dr. Emoto.  It was the water crystal experiment and then there was another at that time on rice.  If I recall I think it only used 2 jars of rice; one for positive words and one for negative words.  The jar of rice that received positive words won out.  It did not ferment like the jar with negative words.

Moving ahead I came across this one that uses three jars of rice; positive words, negative words, and a jar that was ignored.  The jar that was ignored turned out to be the most fermented/rotten.  Take a look at it here Word Power Experiment .

With that said, I am once again more convinced that the biblical basis in scripture which says that life and death are in the power of the tongue and we are transformed by the renewing of our minds.