The Second Annual Language and Society Centre Roundtable 18-19 February 2010 Linguistic Interactions of Saudi EFL Students Participation patterns of students' ACMC interactions Interactional pairings Student-to-Student N=19 Student-to-Instructor N=19 Participation PatternsMSDM Quantity*37.8925.4652.7828.84 Lexical Diversity**91.218.0581.656.11 Lexical Sophistication***1.66.151.56.129 Syntactic Complexity****8.151.948.431.23 *number of words **the ratio of different words to the total number of words ***average number of syllables per word ****average number of words per sentence