Sensory and perceptual processes are the means by which people receive, select, modify, and organize stimulation from the world. Chapter 5. 1 basic sensory and perceptual processes. Scenario: darla"s certain that her 3-day old daughter olivia is already getting to know her. Darla"s husband steve thinks she"s crazy, he states that babies are born blind and probably can"t hear much. To help with this we need to remember that humans have different kinds of sense organs, each receptive to a unique kind of physical energy. Because infants can"t tell us what they"re sensing, methods are developed so we can know what they"re sensing by the way they respond. When a new stimulus is presented, babies pay much attention, but they pay less attention as it becomes more familiar, known as habituation. Newborns respond positively to pleasant smells and negatively to unpleasant ones. Newborns readily differentiate between salty, sour, bitter, and sweet tastes.