Scalar and Ignorance Inferences Are Both Computed Immediately upon Encountering the Sentential Connective: The Online Processing of Sentences with Disjunction Using the Visual World Paradigm

Accounts based on the pragmatic maxim of quantity make different predictions about the computation of scalar versus ignorance inferences. These different predictions are evaluated in two eye-tracking experiments using a visual world paradigm to assess the on-line computation of inferences. The test sentences contained disjunction phrases, which engender both kinds of inferences. The first experiment documented that both inferences are computed immediately upon encountering the disjunctive connective, at nearly identical temporal locations. The second experiment was designed to determine whether or not there exists an intermediate stage at which the truth of the corresponding conjunction phrase is ignored. No such stage was found

Sometimes children are as good as adults : the pragmatic use of prosody in children's on-line sentence processing

This study examined 4-year-old Mandarin-speaking children's sensitivity to prosodic cues in resolving speech act ambiguities, using eye-movement recordings. Most previous on-line studies have focused on children's use of prosody in resolving structural ambiguities. Although children have been found to be sensitive to prosodic information, they use such information less effectively than adults in on-line sentence processing. The present study takes advantage of special properties of Mandarin Chinese to investigate the role of prosody in children's on-line processing of ambiguities in which prosody serves to signal the illocutionary meaning of an utterance (i.e., whether the speaker is asking a question or making a statement). We found that the effect of prosody in this case was as robust in children as it was in adults. This suggests that children are as sensitive as adults in using prosody in on-line sentence processing, when prosody is used to resolve a pragmatic ambiguity.16 page(s

The Online processing of only if and even if conditional statements : implications for mental models

A sentential connective like only if or even if merges two simple propositions into a complex statement. This study used a visual world paradigm experiment to explore how this merging process proceeds online. We first presented participants with a short animation, illustrating different simple propositions that are possible to be merged by the sentential connectives. We then auditorily played an only if or an even if statement and recorded participants' eye movements on the concurrent test image. We observed that hearing the sentential connective results in more fixations on the tokens of the appropriate propositions that are eligible to be merged by the sentential connective. Each sentential connective elicited anticipatory effect suggests that once they heard the sentential connective, participants knew which propositions could be merged. We then discussed the implications of our results to the mental model theory of conditionals and the experimental studies reported in literature.13 page(s

Mandarin-speaking children's processing of garden-path constructions

The project investigates how four- and five-year-old Mandarin-speaking children process garden-path constructions in real time

The Anticipatory effects of focus operators : a visual-world paradigm eye-tracking study of "only if" and "even if" conditionals

14 page(s

Grammatical aspect and event recognition in children's online sentence comprehension

This study investigated whether or not the temporal information encoded in aspectual morphemes can be used immediately by young children to facilitate event recognition during online sentence comprehension. We focused on the contrast between two grammatical aspectual morphemes in Mandarin Chinese, the perfective morpheme -le and the (imperfective) durative morpheme -zhe. The perfective morpheme -le is often used to indicate that an event has been completed, whereas the durative morpheme -zhe indicates that an event is still in progress or continuing. We were interested to see whether young children are able to use the temporal reference encoded in the two aspectual morphemes (i.e., completed versus ongoing) as rapidly as adults to facilitate event recognition during online sentence comprehension. Using the visual world eye-tracking paradigm, we tested 34 Mandarin-speaking adults and 99 Mandarin-speaking children (35 three-year-olds, 32 four-year-olds and 32 five-year-olds). On each trial, participants were presented with spoken sentences containing either of the two aspectual morphemes while viewing a visual image containing two pictures, one representing a completed event and one representing an ongoing event. Participants' eye movements were recorded from the onset of the spoken sentences. The results show that both the adults and the three age groups of children exhibited a facilitatory effect trigged by the aspectual morpheme: hearing the perfective morpheme -le triggered more eye movements to the completed event area, whereas hearing the durative morpheme -zhe triggered more eye movements to the ongoing event area. This effect occurred immediately after the onset of the aspectual morpheme, both for the adults and the three groups of children. This is evidence that young children are able to use the temporal information encoded in aspectual morphemes as rapidly as adults to facilitate event recognition. Children's eye movement patterns reflect a rapid mapping of grammatical aspect onto the temporal structures of events depicted in the visual scene.15 page(s