The purpose of this study was to determine whether it is possible to distinguish between "difficult" and "easy" constructions for second language (L2) learners by examining characteristics of the structures as they occur in aural input. In a multidimensional analysis of 3 English structures with different acquisition profiles-the simple past, possessive determiners his/her , and the progressive aspect-we examined the phonological, morphosyntactic, and lexicosemantic characteristics of the forms as they occurred in a 110,000-word corpus of instructional talk to L2 learners. We analyzed the type/token distributions of the forms, their lexical properties, and their perceptual salience. Our findings revealed key input factors that distinguished between the early-acquired progressive, on the one hand, and the later-acquired past and his/her determiners, on the other hand. These results lend support to theoretical accounts of the input-acquisition relationship and also generate hypotheses for manipulating instructional input to increase the salience of opaque constructions.
WHAT CONTRIBUTES TO MAKINGA LINguistic structure easy or difficult to acquire? More The Modern Language Journal, 93, iii, (2009) 0026-7902/09/336-353 $1.50/0 C 2009 The Modern Language Journalspecifically, what can a close examination of the spoken input to which learners are exposed tell us about this easy/difficult conundrum? To address this issue, we took a multidimensional approach to the analysis of a 110,000-word corpus of teacher talk to second language (L2) learners, in contexts where the classroom constituted the