These two types of trials were designed to depend primarily on bottom-up and top-down processing, respectively, although we recognized that it is not possible. An example for such a top-down process is the context effect. Contextual cues may influence perceptual organisation of the presented ambiguous. whether visual processing is organized bottom-up or top-down. Following up on earlier work (Reicher, ;Navon, ), the. authors used. Bottom-up processing refers to sensory information from a stimulus in the environment driving a process, and top-down processing refers to knowledge and.