Imagination - a cognitive mental process, which consists in creating new images by processing the materials perceptions and representations received in the previous experiment, a form of reflection of reality in the person of new, unusual, unexpected combinations and relationships.
imagination can be intentional and unintentional.
Unintentional passive imagination is observed with the weakening of consciousness, with its disorders, drowsy state, in a dream. This is not imagination in advance that goal, without special intention, without effort of will on the part of man. In this case the images are created as if by themselves: bizarre looking at the clouds, we "see" an elephant, a bear, a person's face ... Unintentional passive imagination caused primarily by the currently unmet needs - in an arid desert in humans there are images of water sources, wells, oases - mirages (hallucinations - a pathological disorder of perceptual activity, nothing to do with the imagination does not have).