1 Introduction
2 Idioms as Formulaic Language in the Mental Lexicon
2.1 An Overview of Formulaic Language
2.1.1 Lexical Bundles
2.1.2 Fixed Phrases
2.1.3 Lexical Collocations
2.1.4 Proverbs
2.2 Idioms as a Unique Type of Formulaic Language
2.3 Theoretical Frameworks of Idiom Processing
2.3.1 The Idiom List Hypothesis
2.3.2 The Lexical Representation Hypothesis
2.3.3 The Direct Access Hypothesis
2.3.4 The Configuration Hypothesis
2.3.5 The Idiom Decomposition Hypothesis
2.3.6 Hybrid Views
3 Experimental Approaches to Investigating Idiom Processing
3.1 Metalinguistic Judgments or Ratings
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