One system may come when another goes. Donna Williams sees it as an involuntary compensation for information overload. She responds to information overload by automatically switching into mono. Donna Williams said that people who operate in mono-track have difficulty with processing, monitoring, and accessing information. She discussed each separately.
Most people can process using all senses simultaneously.
Those who are mono can often process with only one sensory mode at a time. For people who work in mono, processing what they are watching while walking may mean that their body arrives in places as if by magic. Most people know what their body is doing while they are speaking or what their face is doing while they are using sign. Most people are able to consistently monitor all these things because they are multi-tracked. People who work in mono are not so efficient at this.