There's a spectrum of sensory processing issues, but in the broadest sense of the word, sensory processing disorders change how incoming information is organized. Children and adults with sensory processing disorders may interpret touch, sight, sound and taste by under- or over-processing (or both) these stimuli, which can have a big impact on learning and on everyday life. Sensory difficulties can impact visual, auditory and tactile stimuli, taste and smell, proprioceptive input and vestibular input.