Japanese Discourse and the Process of Centering

This paper has two aims: (1) to generalize a computational account of discourse processing called CENTERING and apply it to discourse processing in Japanese, and (2) to provide some insights on the effect of syntactic factors in Japanese on discourse interpretation. We argue that while discourse interpretation is an inferential process, the syntactic cues constrain this process, and demonstrate this argument with respect to the interpretation of ZEROS, unexpressed arguments of the verb, in Japanese. The syntactic cues in Japanese discourse that we investigate are the morphological markers for grammatical TOPIC, the post-position wa, as well as those for grammatical functions such as SUBJECT, ga, OBJECT, o and OBJECT2, ni. In addition, we investigate the role of speakers\u27 EMPATHY, which is the perspective from which an event is described. This is morphologically indicated through the use of verbal compounding, i.e. the auxiliary use of verbs such as kureta, kita. Our results are based on a survey of native speakers of their interpretation of short discourses, consisting of minimal pairs, varied by one of the above factors. We demonstrate that these syntactic cues do indeed affect the interpretation of ZEROS, but that having previously been the TOPIC and being realized as a ZERO also contribute to an entity being interpreted as the TOPIC. We propose a new notion of TOPIC AMBIGUITY, and show that CENTERING provides constraints on when a ZERO can be interpreted as the TOPIC

Elaboration: A Function and a Form

Proceedings of the Twenty-Third Annual Meeting of the Berkeley Linguistics Society: General Session and Parasession on Pragmatics and Grammatical Structure (1997

A Lexicalized Tree Adjoining Grammar for English

This paper presents a sizable grammar for English written in the Tree Adjoining grammar (TAG) formalism. The grammar uses a TAG that is both lexicalized (Schabes, Abeillé, Joshi 1988) and feature-based (Vijay-Shankar, Joshi 1988). In this paper, we describe a wide range of phenomena that it covers. A Lexicalized TAG (LTAG) is organized around a lexicon, which associates sets of elementary trees (instead of just simple categories) with the lexical items. A Lexicalized TAG consists of a finite set of trees associated with lexical items, and operations (adjunction and substitution) for composing the trees. A lexical item is called the anchor of its corresponding tree and directly determines both the tree\u27s structure and its syntactic features. In particular, the trees define the domain of locality over which constraints are specified and these constraints are local with respect to their anchor. In this paper, the basic tree structures of the English LTAG are described, along with some relevant features. The interaction between the morphological and the syntactic components of the lexicon is also explained. Next, the properties of the different tree structures are discussed. The use of S complements exclusively allows us to take full advantage of the treatment of unbounded dependencies originally presented in Joshi (1985) and Kroch and Joshi (1985). Structures for auxiliaries and raising-verbs which use adjunction trees are also discussed. We present a representation of prepositional complements that is based on extended elementary trees. This representation avoids the need for preposition incorporation in order to account for double wh-questions (preposition stranding and pied-piping) and the pseudo-passive. A treatment of light verb constructions is also given, similar to what Abeillé (1988c) has presented. Again, neither noun nor adjective incorporation is needed to handle double passives and to account for CNPC violations in these constructions. TAG\u27S extended domain of locality allows us to handle, within a single level of syntactic description, phenomena that in other frameworks require either dual analyses or reanalysis. In addition, following Abeillé and Schabes (1989), we describe how to deal with semantic non compositionality in verb-particle combinations, light verb constructions and idioms, without losing the internal syntactic composition of these structures. The last sections discuss current work on PRO, case, anaphora and negation, and outline future work on copula constructions and small clauses, optional arguments, adverb movement and the nature of syntactic rules in a lexicalized framework

Beyond HEQCO’s Skills Assessments: Validation of a Measure of Students’ Academic Capital and Evidence of Grade Inflation in Ontario’s High Schools and Universities

Abstract In the U.S., it is well documented that many students enter universities unprepared, lacking the basic academic skills necessary for optimal, or even positive, outcomes. However, less evidence has been reported on this problem in Canada, and there appears to be a public impression that Canada’s universities have higher standards, on average, than American universities. This perception is reflected in documents produced by the Ontario Government, but documents prepared by independent sources, such as Statistics Canada and HEQCO, suggest otherwise. The present article adds to this independent literature, reporting on a new empirical measure based on a suite of questions assessing the basic academic skills necessary to meet the challenges of a higher education. Seven sets of skills were identified and through exploratory and confirmatory factor analysis two forms of academic capital were identified, as were three clusters of students. Evidence for validity of these measures was found in terms of hypothesized associations with student grades, satisfaction, and thoughts of dropping out. Demographic differences (e.g., family background, gender) were minimal. The results suggest that a majority of Ontario’s university students are at-risk of sub-optimal academic outcomes, including a sizeable minority that is likely dysfunctional in contexts in which using basic academic skills would be necessary to pass courses if it were not for grade inflation. These students report lower grades, greater dissatisfaction with the university experience, and more frequent thoughts of dropping out. Policy implications are discussed in terms of what governments, secondary schools, and universities might do to reduce skill deficiencies and the associated negative experiences with post-secondary education

Polymorphism of the Tryptophan Hydroxylase 2 (TPH2) Gene Is Associated with Chimpanzee Neuroticism

In the brain, serotonin production is controlled by tryptophan hydroxylase 2 (TPH2), a genotype. Previous studies found that mutations on the TPH2 locus in humans were associated with depression and studies of mice and studies of rhesus macaques have shown that the TPH2 locus was involved with aggressive behavior. We previously reported a functional single nucleotide polymorphism (SNP) in the form of an amino acid substitution, Q468R, in the chimpanzee TPH2 gene coding region. In the present study we tested whether this SNP was associated with neuroticism in captive and wild-born chimpanzees living in Japan and Guinea, respectively. Even after correcting for multiple tests (Bonferroni p = 0.05/6 = 0.008), Q468R was significantly related to higher neuroticism (β = 0.372, p = 0.005). This study is the first to identify a genotype linked to a personality trait in chimpanzees. In light of the prior studies on humans, mice, and rhesus macaques, these findings suggest that the relationship between neuroticism and TPH2 has deep phylogenetic roots

Grammatical and discourse properties of null arguments in English

This study is concerned with the nature and use of null subjects and objects in English and with how these null arguments compare with those in other languages. Based on broad idiosyncratic cross-linguistic variation, it is proposed that, in general, the only absolute constraint on null arguments is interpretability. For English, evidence is presented that argues against the theory that there are no zero pronominal subjects, only apparent cases resulting from the operation deleting initial, destressed material. Using a corpus of conversational data, it is also shown that null subjects exhibit a highly significant tendency to occur at three types of boundaries in discourse: turn boundaries, discourse segment boundaries, and discourse package boundaries. Previous proposals concerning the discourse functions of null subjects are shown to be problematic, and it is suggested that the intuitions underlying them may be explained indirectly. Null subject utterances are also compared with other superficially similar forms. For null objects, six different types are considered. For all but generic null objects, evidence indicates that they must be present in the grammar but only at the lexical level. For arbitrary null objects, apparent binding principle parallels between English and other languages are shown to result from discourse constraints. In general, it is demonstrated that a lexical representation based on conceptual structures readily handles the characteristics of implicit objects in English. Examining discourse properties, it is proposed that null objects must be consistent with the underlying context and intentional structure of the discourse at the time of utterance. Apparent stereotype constraints are actually contextual constraints combined with conversational maxims. Additional constraints apply to specific verb types, subject to change across registers or dialects. A revision is made to an existing model of local discourse structure (Centering) to make use of lexical conceptual information. This modification also handles some event references. The revision is related to the proposal that Centering should fit into a situation semantics and include situationally-present entities. Finally, cross-linguistic issues are reconsidered and, based on the English study, two additional means for meeting the interpretability constraint are described