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Subliminal Perception

Humans are constantly perceiving visual and auditory stimuli. Sometimes our perception of these stimuli occurs consciously: we are aware of a stimulus and know what we are perceiving it. But our perception of a stimulus can also occur without our awareness: an image might appear and disappear before our eyes too quickly for us to notice what we saw it, or a sound might be too faint for us to realize that we heard it. This phenomenon---the perception of a stimulus just below the threshold of conscious awareness---is called subliminal perception. Experiments have shown that subliminally perceived stimuli can influence people’s thoughts and attitudes.

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Describe what subliminal perception is and explain how the experiment discussed by the professor illustrates this phenomenon.

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