S. Carrol , & M Swain . (1993). Explicit and implicit negative feedback. Studies in Second Language Acquisition, 15, 357−386.
D Dor . (2005). Toward a semantic account of that-deletion in English. Linguistics, 43 (2), 345−382.
M Durham . (2011). I think (that) something’s missing: complementizer deletion in nonnative e-mails. Studies in Second Language Learning and Teaching, 1 (3), 421−445.
N. C. Ellis , & F Ferreira-Junior . (2009a). Constructions and their acquisition: islands and the distinctiveness of their occupancy. Annual Review of Cognitive Linguistics, 7, 188−221.
N. C. Ellis , & F Ferreira-Junior . (2009b). Construction learning as a function of frequency, frequency distribution, and function. Modern Language Journal, 93, 370−385.
J Elsness . (1984). That or zero? A look at the choice of objective clause connective in a corpus of American English. English Studies, 65, 519−533.
G Gilquin . (2007). To err is not all: what corpus and elicitation can reveal about the use of collocation by learners. Zeitschrift für Anglistik und Amerikanistik, 55 (30), 273−291.
J. A Hawkins . (2004). Efficiency and complexity in grammars. Oxford: Oxford University Press.
T. F Jaeger . (2010). Redundancy and reduction: speakers manage syntactic information density. Cognitive Psychology, 61, 23−62.
S. Montrul , & C Rodríguez Louro . (2006). Beyond the syntax of the null subject parameter: a look at the discourse-pragmatic distribution of null and overt subjects by L2 learners of Spanish. In L. Escobar , & V. Torrens (Eds.), The acquisition of syntax in Romance languages (pp. 401−418). Amsterdam: John Benjamins.
J. M. Norris , & L Ortega . (2000). Effectiveness of L2 instruction: a research synthesis and quantitative meta-analysis. Language Learning, 50, 417−528.
J Rothman . (2009). Pragmatic deficits with syntactic consequences: L2 pronominal subjects and the syntax−pragmatics interface. Journal of Pragmatics, 41, 951−973.
J. Rothman , & P Guijarro-Fuentes . (2010). Input quality matters: some comments on input type and age-effects in adult SLA. Applied Linguistics, 31 (2), 301−306.
J. R Saffran . (2003). Statistical language learning: mechanisms and constraints. Current Directions in Psychological Science, 12 (4), 110−114.
G Storms . (1966). That-clauses in Modern English. English Studies, 47, 249−270.
S. Tagliamonte , & J Smith . (2005). No momentary fancy! The zero ‘complementizer’ in English dialects. English Language and Linguistics, 9 (2), 289−309.
S. A. Thompson , & A. J Mulac . (1991). The discourse conditions for the use of the complementizer that in conversational English. Journal of Pragmatics, 15, 237−251.
R. Torres Cacoullos , & J. A Walker . (2009). On the persistence of grammar in discourse formulas: a variationist study of that. Linguistics, 47, 1−43.
S. Wulff , & St. Th Gries . (2011). Corpus-driven methods for assessing accuracy in learner production. In P. Robinson (Ed.), Second language task complexity: researching the Cognition Hypothesis of language learning and performance (pp. 61−88). Amsterdam & Philadelphia: John Benjamins.
T Wasow . (1997). Remarks on grammatical weight. Language Variation and Change, 9, 81−105.