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... that a person's locus of awareness has separated from their physical body. Factors leading to it are, relaxation and reduced sensory input, though drugs such as LSD are said to induce similar out-of-body feelings. Loss of input control Susan Blackmore (1986) claims that what we know as being 'out there' is because our senses construct models of the world with ourselves in it, through our minds ('models of reality'). We understand these models as 'real' and the thoughts that we have as 'unreal' (daydreams, fantasies etc). However, what is real depends on which 'model of reality' the brain uses to represent the world. By comparing the models available at a given time, the brain chooses the most stable one to represent 'reality'. In our waking life, the most stable model we have is through our senses. That's why everything around us seems real. However, as we fall asleep, this model becomes ...