Describes how Random Boolean Networks can be used to simulate simple lexicons, and shows how some puzzling properties of real lexicons seem to emerge spontaneously in these models. Describes simple simulations of bilingual aphasia, and shows that a range of recovery patterns can be observed in these simulations. (Author/VWL)

B. Rapp and M. Goldrick (2000) claimed that the lexical and mixed error biases in picture naming by aphasic and nonaphasic speakers argue against models that assume a feedforward-only relationship between lexical items and their sounds in spoken word production. The author contests this claim by showing that a feedforward-only model like WEAVER++…

This is my daughter's story, although the voice is mine. Heather is an adult whose life is complicated by congenital blindness, cognitive impairment, epilepsy, and expressive aphasia. Typically, communication between Heather and others is a two-way challenge: At each step, everyone involved must perceive, interpret, and confirm understanding. An…