ERP evidence for different strategies in the processing of case markers in native speakers and non-native learners

BACKGROUND: The present experiments were designed to test how the linguistic feature of case is processed in Japanese by native and non-native listeners. We used a miniature version of Japanese as a model to compare sentence comprehension mechanisms in native speakers and non-native learners who had received training until they had mastered the system. In the first experiment we auditorily presented native Japanese speakers with sentences containing incorrect double nominatives and incorrect double accusatives, and with correct sentences. In the second experiment we tested trained non-natives with the same material. Based on previous research in German we expected an N400-P600 biphasic ERP response with specific modulations depending on the violated case and whether the listeners were native or non-native. RESULTS: For native Japanese participants the general ERP response to the case violations was an N400-P600 pattern. Double accusatives led to an additional enhancement of the P600 amplitude. For the learners a native-like P600 was present for double accusatives and for double nominatives. The additional negativity, however, was present in learners only for double nominative violations, and it was characterized by a different topographical distribution. CONCLUSION: The results indicate that native listeners use case markers for thematic as well as syntactic structure building during incremental sentence interpretation. The modulation of the P600 component for double accusatives possibly reflects case specific syntactic restrictions in Japanese. For adult language learners later processes, as reflected in the P600, seem to be more native-like compared to earlier processes. The anterior distribution of the negativity and its selective emergence for canonical sentences were taken to suggest that the non-native learners resorted to a rather formal processing strategy whereby they relied to a large degree on the phonologically salient nominative case marker

Comprehending Turkish sentences using word order, thematic roles, and case

A core aspect of sentence comprehension is assigning thematic roles such as agents and patients to nouns. Turkish, a flexible word order language with accusative case-marking, allows us to compare the relative effect of word order, case-marking, and thematic reversibility in sentence comprehension. We conducted two spoken language comprehension experiments to investigate the relationships among these factors. Native Turkish-speaking adults were faster and more accurate in comprehending sentences with default word order than those with scrambled word order; case-marked sentences than non-casemarked sentences; and sentences with thematically irreversible nouns than those with reversible nouns. The effect of word order depended on the reversibility of the nouns, and case-marking had little-to-no effect on comprehension when the nouns were thematically irreversible. Our results suggest that while Turkish speakers use multiple cues to map thematic roles onto nouns, there are diminishing returns of facilitation with each additional source of information. These results give support to race-based models of sentence comprehension

Negative Transfer Effects on L2 Word Order Processing

Does first language (L1) word order affect the processing of non-canonical but grammatical syntactic structures in second language (L2) comprehension? In the present study, we test whether L1-Spanish speakers of L2-Basque process subject-verb-object (SVO) and object-verb-subject (OVS) non-canonical word order sentences of Basque in the same way as Basque native speakers. Crucially, while OVS orders are non-canonical in both Spanish and Basque, SVO is non-canonical in Basque but is the canonical word order in Spanish. Our electrophysiological results showed that the characteristics of L1 affect the processing of the L2 even at highly proficient and early-acquired bilingual populations. Specifically, in the non-native group, we observed a left anterior negativity-like component when comparing S and O at sentence initial position and a P600 when comparing those elements at sentence final position. Those results are similar of those reported by Casado et al. (2005) for native speakers of Spanish indicating that L2-Basque speakers rely in their L1-Spanish when processing SVO-OVS word order sentences. Our results favored the competition model (MacWhinney, 1997).This research has been supported by grants from the Spanish Ministerio de Economia y Competitivad and Ministerio de Ciencia e Innovacion (FFI2015-64183-P and RYC-2010-06520) and the Basque Government (IT665-13)

Rapid neural processing of grammatical tone in second language learners

The present dissertation investigates how beginner learners process grammatical tone in a second language and whether their processing is influenced by phonological transfer. Paper I focuses on the acquisition of Swedish grammatical tone by beginner learners from a non-tonal language, German. Results show that non-tonal beginner learners do not process the grammatical regularities of the tones but rather treat them akin to piano tones. A rightwards-going spread of activity in response to pitch difference in Swedish tones possibly indicates a process of tone sensitisation. Papers II to IV investigate how artificial grammatical tone, taught in a word-picture association paradigm, is acquired by German and Swedish learners. The results of paper II show that interspersed mismatches between grammatical tone and picture referents evoke an N400 only for the Swedish learners. Both learner groups produce N400 responses to picture mismatches related to grammatically meaningful vowel changes. While mismatch detection quickly reaches high accuracy rates, tone mismatches are least accurately and most slowly detected in both learner groups. For processing of the grammatical L2 words outside of mismatch contexts, the results of paper III reveal early, preconscious and late, conscious processing in the Swedish learner group within 20 minutes of acquisition (word recognition component, ELAN, LAN, P600). German learners only produce late responses: a P600 within 20 minutes and a LAN after sleep consolidation. The surprisingly rapid emergence of early grammatical ERP components (ELAN, LAN) is attributed to less resource-heavy processing outside of violation contexts. Results of paper IV, finally, indicate that memory trace formation, as visible in the word recognition component at ~50 ms, is only possible at the highest level of formal and functional similarity, that is, for words with falling tone in Swedish participants. Together, the findings emphasise the importance of phonological transfer in the initial stages of second language acquisition and suggest that the earlier the processing, the more important the impact of phonological transfer

Syntactic Frequency and Sentence Processing in Standard Indonesian:Data from agrammatic aphasia and ERP

Aphasia is a language impairment caused by focal brain damage affecting multiple channels of language. Studies have shown that one third of stroke patients show some form of aphasia. One of the key characteristics of aphasia is that in most types, patients show deficits in sentence processing. This is so much so that many aphasia assessment tools utilize sentence comprehension or production tasks to determine aphasia type or severity, or perhaps to provide a more detailed profile on the symptoms. Individuals with aphasia have been known to face difficulties in processing sentences with a derived or non-canonical structure, like the passive. While numerous studies have discussed the morphosyntactic basis of this deficit, other aspects of sentence processing such as frequency of the sentence structures are often neglected. There is considerable possibility of syntactic frequency affecting sentence processing, as a large body of research has shown the impact of word-level frequency towards language processing. Could the impairment of processing non-canonical sentences be related to the low frequency of these sentences?This thesis examines sentence processing in Standard Indonesian, a language where the passive occurs at a rate that is comparable to active sentences. Individuals with aphasia and controls were tested with sentence comprehension and production tasks, and an event-related potential study of sentence processing for healthy adults were conducted. We found the passive to be unimpaired for aphasic individuals, and we also did not find any observable processing differences between the active and the passive in the neuroimaging experiment

Plasticity of grammatical recursion in German learners of Dutch

Previous studies have examined cross-serial and embedded complement clauses in West Germanic in order to distinguish between different types of working memory models of human sentence processing, as well as different formal language models. Here, adult plasticity in the use of these constructions is investigated by examining the response of German-speaking learners of Dutch using magnetoencephalography (MEG). In three experimental sessions spanning their initial acquisition of Dutch, participants performed a sentence-scene matching task with Dutch sentences including two different verb constituent orders (Dutch verb order, German verb order), and in addition rated similar constructions in a separate rating task. The average planar gradient of the evoked field to the initial verb within the cluster revealed a larger evoked response for the German order relative to the Dutch order between 0.2 to 0.4 s over frontal sensors after 2 weeks, but not initially. The rating data showed that constructions consistent with Dutch grammar, but inconsistent with the German grammar were initially rated as unacceptable, but this preference reversed after 3 months. The behavioural and electrophysiological results suggest that cortical responses to verb order preferences in complement clauses can change within 3 months after the onset of adult language learning, implying that this aspect of grammatical processing remains plastic into adulthood

Semantic radical consistency and character transparency effects in Chinese: an ERP study

BACKGROUND: This event-related potential (ERP) study aims to investigate the representation and temporal dynamics of Chinese orthography-to-semantics mappings by simultaneously manipulating character transparency and semantic radical consistency. Character components, referred to as radicals, make up the building blocks used dur...postprin

Euskal Gramatika prozesatzen: Hastapenetako zenbait emaitza

Beñat Oihartzabali Gorazarre: Festschrift for Bernard Oyharçabal / Ricardo Etxepare, Ricardo Gómez, Joseba Andoni Lakarra (arg./eds)[EN] After a brief introduction to ERP methods in the study of language, we report some recent results from a set of experiments investigating morphosyntactic processing in Basque. First we report results from experiments that focus on word-order processing, with special attention to verb medial sentences, where subjects show no preference for either SVO or OVS orders, in contrast with the sharp asymmetry found in SOV versus OSV orders in previous work. Second, we report results from a set of conductual and ERP experiments targeted to explore object agreement, which suggest that it is neurocognitively distinct from subject agreement.Ikertzaileek BRAINGLOT, CSD2007-00012/CONSOLIDER-INGENIO 2010 (MICINN), SEJ2007-60751/PSIC (MEC), eta GIU06/52 (Eusko Jaurlaritza-EHU) proiektuen babesa jaso dute