'Reverse Speech'

(1) Human speech has two distinctive yet complementary functions and modes. The Overt mode is spoken forwards and is primarily under conscious control. The Covert mode is spoken backward and is not under conscious control. The backward mode of speech occurs simultaneously with the forward mode and is a reversal of the forward speech sounds.

(2) These two modes of speech, forward and backward, are dependent upon each other and form an integral part of human communication. One mode cannot be fully understood without the other mode. In the dynamics of interpersonal communication, both modes of speech combined communicate the total psyche of the person, conscious as well as unconscious.

(3) Covert speech develops before overt speech. Children speak backwards before they do forwards. Then, as forward speech commences, the two modes of speech gradually combine into one, forming an overall bi-level communication process.

It has been called the discovery of the 7th sense. The research into this phenomenon has been described as being of "Nobel calibre". It has been featured in numerous publications around the world, and in the United States it became a household name in the late 90s. It is called Reverse Speech, the phenomenon of hidden backward messages in speech. It initially gained worldwide fame in the early 80s as those strange backward messages in rock and roll. Since that time, research has progressed significantly and it is now known to exist in all forms of human speech.

If human speech is recorded and played backwards, mixed amongst the gibberish at regular intervals can be heard very clear statements. These statements usually appear in short sentence form and are nearly always related to the forward speech. It appears constantly throughout language, so much so in fact, that it is believed to be a natural part of our speech processes.(Reverse Speech Web Site)