... include subliminal messages and the phenomenon of blindsight, both of which are discussed below, following a brief review of the psychological understanding of consciousness. The psychological understanding of consciousness The renowned psychologist Sigmund Freud believed that speech errors ('Freudian slips') provide a window into the unconscious processing occurring in an individuals brain (Parkin 1996b). Thus, if an individual makes a mistake in their normal language, this indicates that there is an unconscious element to what they are thinking about or saying, of which they are unaware. Despite this lack of awareness the unconscious processing impacts the consciousness to such as extent that it would manifest in the individual's speech. Freud believed that this unconscious processing was ordinarily repressed (Kelly, Alvarado 2005Frederick Myers believed that the theory of consciousness should be derived from a unified model of the mind (Kelly, Alvarado 2005). As such, any phenomenon with a subliminal origin, such as dreams, ...

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