Adult learners have persistent difficulty processing second language (L2)
inflectional morphology. We investigate associative learning explanations that
involve the blocking of later experienced cues by earlier learned ones in the
first language (L1; i.e., transfer) and the L2 (i.e., proficiency). Sagarra
(2008) and Ellis and Sagarra (2010b) found that, unlike Spanish
monolinguals, intermediate English-Spanish learners rely more on salient adverbs
than on less salient verb inflections, but it is not clear whether this
preference is a result of a default or a L1-based strategy. To address this
question, 120 English (poor morphology) and Romanian (rich morphology) learners
of Spanish (rich morphology) and 98 English, Romanian, and Spanish monolinguals
read sentences in L2 Spanish (or their L1 in the case of the monolinguals)
containing adverb-verb and verb-adverb congruencies or incongruencies and chose
one of four pictures after each sentence (i.e., two that competed for meaning
and two for form). Eye-tracking data revealed significant effects for (a)
sensitivity (all participants were sensitive to tense incongruencies), (b) cue
location in the sentence (participants spent more time at their preferred cue,
regardless of its position), (c) L1 experience (morphologically rich L1 learners
and monolinguals looked longer at verbs than morphologically poor L1 learners
and monolinguals), and (d) L2 experience (low-proficiency learners read more
slowly and regressed longer than high-proficiency learners). We conclude that
intermediate and advanced learners are sensitive to tense incongruencies
and—like native speakers—tend to rely more heavily on
verbs if their L1 is morphologically rich. These findings reinforce theories
that support transfer effects such as the unified competition model and the
associative learning model but do not contradict Clahsen and Felser’s
(2006a) shallow structure hypothesis
because the target structure was morphological agreement rather than syntactic
agreement.