our nose may perceive something with yeast and spices cooking but our eyes must confirm that it is a large pepperoni pizza with bubbling mozzarella and green peppers. our hearing can tell us that a friend sounds angry and upset but only our vision can register the scowl clenched jaw and stiff posture. the way we perceive visual stimuli shapes our interactions with and reactions to the environment while providing a foundation for the development of a more complex learning structure