Optimality theory in phonological acquisition

This tutorial presents an introduction to the contemporary linguistic frame work known as optimality theory (OT). The basic assumptions of this constra int-based theory as a general model of grammar are first outlined, with for mal notation being defined and illustrated. Concepts unique to the theory, including "emergence of the unmarked," are also described. OT is then exami ned more specifically within the context of phonological acquisition. The t heory is applied in descriptions of children's common error patterns, obser ved inter- and intrachild variation, and productive change over time. The p articular error patterns of fronting, stopping, final-consonant deletion, a nd cluster simplification are considered from an OT perspective. The discus sion concludes with potential clinical applications and extensions of: the theory to the diagnosis and treatment ol: children with functional phonolog ical disorders.