One could say they are the conveyers of the perceptual strategy. They convey the American or Malaysian or Navajo culture by their words, actions, emotions, rewards, and punishments. All of the members of any one culture perceive similarly. They value similar ideas, things, events, and behaviors. They are often blind to possibilities that lie outside of their culture.
Western culture obscures the obvious the natural.
This is the way that we have been taught to perceive. Instead of learning to pay attention to nature, we learn to pay attention to words, numbers, concepts, human-made products, electronic signals, and so forth. Often these are arranged in elaborate series such as science, business, or fashion. Simpler cultures must pay attention to natural phenomena. These people are trained by their parents to pay attention to the qualities of the earth, plants, animals, and weather.