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. These two modes of speech, forward and backward, are dependent upon each other and form an integral part of human communication . . .
Covert speech develops before overt speech.
Children speak backwards before they do forwards . . . Reverse speech is the voice of truth and it is complementary with forward speech. The two modes occur simultaneously yet are formed in different areas of the mind. Simply, forward speech is from the left brain and Reverse Speech is from the right brain. . . . If a lie is spoken forwards, the truth may be spoken backwards.