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Presents a model of the cognitive processes involved in the spoken production of verbal numbers (eg, 13,402), based on single-case studies of 2 brain-damaged Ss (a 66-yr-old man and a 22-yr-old woman) with number production deficits. It is suggested that verbal-number production involves the generation of a syntactic frame that constitutes a plan for the production of the appropriate sequence of words. The syntactic frame specifies each to-be-retrieved word in terms of a number-lexical class (ie, ones, teens, or tens) and a position within that class. These class/position-within-class specifications guide the retrieval of lexical representations from a production lexicon that is partitioned into functionally distinct ones, teens, and tens classes. The rationale for, and advantages of, using patterns of impaired performance as a basis for drawing inferences about normal cognition are discussed. Case histories and …