Contents : Grammatical and Oral Fossilization of a College Student in English Acquisition: A Longitudinal , Exploring Grammatical Errors in Teaching Materials , Can Frequency Account for the Grammatical Choices of Children and Adults in Nominal Modification Contexts? Evidence from Elicited Production and Child-Directed Speech , Preposition Stranding vs. Pied-Piping—The Role of Cognitive Complexity in Grammatical Variation ,Correlative Coordination and Variable Subject–Verb Agreement in ,Smooth Signals and Syntactic Change,Beyond Mere Text Frequency: Assessing Subtle Grammaticalization by Different Quantitative Measures. A Case Study on the Dutch Soort ,Grammatical Gender Disambiguates Syntactically Similar , Acceptability of Different Psychological VerbalConstructions by Heritage Spanish Speakers from California .