"optimality theory" の定義と意味

What is "optimality theory"?

Optimality theory is a linguistic framework that explains how linguistic forms are generated based on competing constraints. Developed by Alan Prince and Paul Smolensky, this theory posits that input forms are transformed into outputs through the evaluation of constraints that can be either markedness constraints, which favor simpler structures, or faithfulness constraints, which prioritize preserving the input form. In this model, the best output, or "optimal" form, is selected based on which one satisfies the highest-ranking constraints while violating the least important ones. Optimality theory is used in various linguistic domains, including phonology, syntax, and morphology, providing insights into the variability and complexity of language.