ABSTRACT
Cognitive processes are those mental processes not involving simply sensing the environment or controlling one’s movements, and cognitive disabilities are impairments in cognitive processes. They can arise in many ways, including brain injury or stroke; chromosomal abnormalities that affect the development of the brain (such as Down syndrome), producing developmental disabilities; severe mental illness; or effects of aging (see Chapter 8, “Age-Related Difference in the Interface Design Process”). Often the cause of a cognitive disability is unknown.
