Prediction as memory retrieval: timing and mechanisms

In our target article [Chow, W., Smith, C., Lau, E., & Phillips, C. (2015). A “bag-of-arguments” mechanism for initial verb predictions. Language, Cognition & Neuroscience. Advance online publication. doi:10.1080/23273798.2015.1066832], we investigated the predictions that comprehenders initially make about an upcoming verb as they read and provided evidence that they are sensitive to the arguments’ lexical meaning but not their structural roles. Here we synthesise findings from our work with other studies that show that verb predictions are sensitive to the arguments’ roles if more time is available for prediction. We content that prediction involves computations that may require differing amounts of time. Further, we argue that prediction can be usefully framed as a memory retrieval problem, linking prediction to independently well-understood memory mechanisms in language processing. We suggest that the delayed impact of argument roles on verb predictions may reflect a mismatch between the format of linguistic cues and target event memories. We clarify points of agreement and disagreement with the commentaries, and explain why memory access mechanisms can account for the time course of prediction

Constructing Filler-Gap Dependencies in Chinese Possessor Relative Clauses

PACLIC 19 / Taipei, taiwan / December 1-3, 200

Dynamic syntax account of argument realization in mandarin

Natural languages are systems of forms and meanings; language understanding and language production are processes of establishing mappings between linguistic forms and meanings. The principles and rules governing the mapping between semantic roles and syntactic positions have long been a fundamental topic in contemporary linguistics. Such a mapping is usually called argument realization, argument mapping or argument linking. On the basis of the previous language specific and cross linguistic researches on this issue, this thesis picks out two tasks. One is the empirical task of the investigating the principles and rules governing the mapping between semantic roles and linear syntactic positions in Mandarin Chinese. The other is the theoretical task of the exploration of how argument realization principles and rules play their roles in the live temporal linear comprehension and production of sentences. On the empirical side, this thesis mainly investigates the phenomenon of argument alternation, that is, the non-one-to-one mapping between semantic roles and syntactic forms (linear positions) in Mandarin and argues that alternative syntactic forms in which semantic roles are realized are not arbitrary but semantically motivated. More specifically, it proposes that alternative patterns of argument realization encode different types of events. This thesis concentrates on three major cases of argument alternation. The first is the argument alternation in the resultative verb construction (RVC) that involves two verbs and expresses a complex event consisting of a first (activity) subevent and a second (resultative) subevent. The arguments of the two verbs are mapped onto the subject and the object alternatively and the argument sharing between the verbs results from syntactically constrained pragmatic inference. The argument realization principles and rules of RVC are used to account for two puzzling cases of argument alternation in Mandarin, i.e. the locative alternation and the agentive alternation. This account of inverse argument realizations has the implication that argument alternations are semantically motivated rather than the result of arbitrary syntactic operation. To facilitate the discussion of how different semantic representations arise in different process of comprehension, I adopt Dynamic Syntax (Kempson et al 2001; Cann et al 2005) which provides a package of working hypotheses about human language grammars and the formal tools for representing how grammars work. It is hypothesized in Dynamic Syntax that the grammar of a natural language is a set of constraints over language comprehension; sentences are understood and produced in context through left-to-right word-by-word parsing processes. Parsing processes are driven by the axiomatic requirement of establishing complete logical forms that can be enriched to full propositions. Such processes have the characteristic of semantic underspecification, including underspecified semantic relationships and underspecified semantic contents; semantic underspecification can and must be updated through non-demonstrative inference implemented in linguistic and nonlinguistic contexts. Using the framework I hypothesize that in RVC constructions the first verb provides a condition on the sort of event expressed by the second verb, encoding this in terms of event semantics. It is argued that only the argument of the latter are required to be realized in the string (or be contextually strongly determined) through pro-drop. Those of the activity predicate, however, are inferred through pragmatic means given the arguments that are realized. This directly accounts for the attested patterns of argument realization in RVC and explain the apparent gaps. This analysis is extended to locative and agentive inversion constructions where it is hypothesized that there is null resultative predicate that explains why a non-agent can be realized as subject, even in the presence of a more agentive noun phrase in the string. This thesis thus maintains the hypothesis that the mapping between semantic roles and syntactic positions is direct though not one-to-one. Although there is no one-toone mapping between syntactic forms, the argument mapping rules can ensure efficient comprehension and production when they are applied in context. This thesis provides a uniform account of different argument alternation phenomena that have been seen as unrelated to each other in the literature. The successful uniform explanation of the ‘unrelated’ phenomena of argument alternation can be generalized as a methodology: a thorough semantic analysis of various alternative syntactic constructions can reveal the subtle semantic differences between them and the importance of these subtle semantic difference for a theorectic account of argumenty alternation has been largely underestimated in the literature. This constitutes the foundation of a uniform explanation of syntactic phenomena that seem to be unrelated to each other. This success lights the hope of seeking semantics-based uniform accounts of other different kinds of syntactic phenomena in a single language and across languages in future research

The \u3ci\u3eman\u3csub\u3ei\u3c/sub\u3e said she\u3csub\u3ei\u3c/sub\u3e would return\u3c/i\u3e: English pronominal gender in native Mandarin speaking learners, examined within a comprehensive theory of language acquisition

The project that led to this honors thesis was begun in the Fall semester of 2010, in a graduate-level psycholinguistics course taught by Dr. T. Daniel Seely. At that time, I was intensively studying Mandarin and had been living with a native speaker who was also in the process of learning English. The types of speech errors in her English, particularly the ones that appeared to have resulted from influence from her native Mandarin, interested me greatly. One of the most striking errors that she tended to make, however, was mis-matching English gender-marked pronouns with the gender of the referent. That is, she would frequently say things like The man driving the bus said she could bring me to Ann Arbor, or I love Lady Gaga, his style is so interesting

Mental representation and processing of syntactic structure: evidence from Chinese

From the perspective of cognitive psychology, our knowledge of language can be viewed as mental representations and our use of language can be understood as the computation or processing of mental representations. This thesis explores the mental representation and processing of syntactic structure. The method used in this thesis is structural priming, a phenomenon in which people tend to repeat the linguistic structure that they have recently processed. The language under investigation is Chinese. The main research theme is divided up into four different questions. The first question is how syntactic structure is mentally represented. For a long time this has been a question for syntacticians whose main evidence is their intuition. There are, however, recent calls for experimental methods in the investigation of syntactic representation. I propose that structural priming can be used as an experimental approach to the investigation of syntactic representation. More specifically, structural priming can illuminate the constituent structure of a syntactic construction and help us determine which syntactic analysis corresponds to the representation of the construction. Three structural priming experiments on some controversial constructions in Mandarin were reported to show that structural priming can be used to distinguish alternative analyses of a syntactic construction. The second question concerns the use of thematic and lexical information in grammatical encoding in sentence production. Models of grammatical encoding differ in the locus of conceptual effects on grammatical encoding and the extent to which grammatical encoding is lexically guided. Five experiments were reported on these two issues. First, the results indicate that thematic information affects grammatical encoding by prompting the processor map thematic roles onto the same linear order as they were previously mapped. Though conceptual information was previously believed to only affect the assignment of grammatical functions (e.g., subject and object) to nouns (i.e., functional processing), this finding suggests that it can influence the linear order of sentence constituents (i.e., positional processing) as well. The results also show that the processor persists in using the same argument structure of the verb, implying that grammatical encoding is lexically guided to some extent. The third question concerns the processing of verb-phrase (VP) ellipsis in comprehension. Previous research on this topic disagrees on whether the interpretation of VP ellipsis is based over the syntactic or semantic representation of the antecedent and whether the antecedent representation is copied or reconstructed at the ellipsis site. An experiment was presented and the results show no structural priming effect from the ellipsis site. This suggests that no syntactic structure is reconstructed at the ellipsis and possibly no copying of the antecedent structure either. The results then favour a semantic account of VP ellipsis processing. The last question concerns the lexico-syntactic representation of cognates in Cantonese-Mandarin bilinguals. Previous research has paid little attention as to whether cognates have shared or distinct lemmas in bilinguals. Two experiments show that the structural priming effect from the cognate of a verb was smaller than from the verb itself, suggesting that Cantonese/Mandarin cognates have distinct rather than shared lemmas, though the syntactic information associated with cognates is collectively represented across the two languages. At the end of the thesis, I discussed the implications of these empirical studies and directions of further research

Event-related brain potential evidence for animacy processing asymmetries during sentence comprehension

The animacy distinction is deeply rooted in the language faculty. A key example is differential object marking, the phenomenon where animate sentential objects receive specific marking. We used event-related potentials to examine the neural processing consequences of case-marking violations on animate and inanimate direct objects in Spanish. Inanimate objects with incorrect prepositional case marker ‘a’ (‘al suelo’) elicited a P600 effect compared to unmarked objects, consistent with previous literature. However, animate objects without the required prepositional case marker (‘el obispo’) only elicited an N400 effect compared to marked objects. This novel finding, an exclusive N400 modulation by a straightforward grammatical rule violation, does not follow from extant neurocognitive models of sentence processing, and mirrors unexpected “semantic P600” effects for thematically problematic sentences. These results may reflect animacy asymmetry in competition for argument prominence: following the article, thematic interpretation difficulties are elicited only by unexpectedly animate objects

THE COMPUTATION OF VERB-ARGUMENT RELATIONS IN ONLINE SENTENCE COMPREHENSION

Understanding how verbs are related to their arguments in real time is critical to building a theory of online language comprehension. This dissertation investigates the incremental processing of verb-argument relations with three interrelated approaches that use the event-related potential (ERP) methodology. First, although previous studies on verb-argument computations have mainly focused on relating nouns to simple events denoted by a simple verb, here I show by investigating compound verbs I can dissociate the timing of the subcomputations involved in argument role assignment. A set of ERP experiments in Mandarin comparing the processing of resultative compounds (Kid bit-broke lip: the kid bit his lip such that it broke) and coordinate compounds (Store owner hit-scolded employee: the store owner hit and scolded an employee) provides evidence for processing delays associated with verbs instantiating the causality relation (breaking-BY-biting) relative to the coordinate relation (hitting-AND-scolding). Second, I develop an extension of classic ERP work on the detection of argument role-reversals (the millionaire that the servant fired) that allows me to determine the temporal stages by which argument relations are computed, from argument identification to thematic roles. Our evidence supports a three-stage model where an initial word association stage is followed by a second stage where arguments of a verb are identified, and only at a later stage does the parser start to consider argument roles. Lastly, I investigate the extent to which native language (L1) subcategorization knowledge can interfere with second language (L2) processing of verb-argument relations, by examining the ERP responses to sentences with verbs that have mismatched subcategorization constraints in L1 Mandarin and L2 English (“My sister listened the music”). The results support my hypothesis that L1 subcategorization knowledge is difficult for L2 speakers to override online, as they show some sensitivity to subcategorization violations in offline responses but not in ERPs. These data indicate that computing verb-argument relations requires accessing lexical syntax, which is vulnerable to L1 interference in L2. Together, these three ERP studies allow us to begin to put together a full model of the sub-processes by which verb-argument relations are constructed in real time in L1 and L2

Predicting (in)correctly: listeners rapidly use unexpected information to revise their predictions

Comprehenders can incorporate rich contextual information to predict upcoming input on the fly, and cues that conflict with their predictions are quickly detected. The present study examined whether and how comprehenders may revise their existing predictions upon encountering a prediction-inconsistent cue. We took advantage of the rich classifier system in Mandarin Chinese and tracked participants’ eye-movements as they listened to sentences in which the final noun is preceded by a classifier which was either compatible with the most expected noun, incompatible with the most expected noun but indicative of another contextually suitable noun, or uninformative. We found that, upon hearing a prediction-inconsistent classifier, listeners quickly directed their eye gaze away from the originally expected object and immediately onto the (initially) unexpected but contextually suitable object. This provides initial evidence that listeners can quickly use prediction-mismatching cues to revise their existing predictions on the fly