The identity theory, also known as reductive materialism, is one of the views Churchland uses to describe mind-brain correlation. Churchland believes that the mental states of the body are one and in the same (double aspectism) with brain states. They are the same because the biochemical actions produced in brain states (release of serotonin and acetylcholine) have direct interaction with the mental states (mood disorders such as depression). With the help of psychological and physiological evidence the identity theory can be better supported. It has not yet been proven but following along wi