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This study investigates the comprehension of wh-questions in individuals with aphasia (IWA) speaking Turkish, a non-wh-movement language, and German, a wh-movement language. We examined six German-speaking and 11 Turkish-speaking IWA using picture-pointing tasks. Findings from our experiments show that the Turkish IWA responded more accurately to both object who and object which questions than to subject questions, while the German IWA performed better for subject which questions than in all other conditions. Using random forest models, a machine learning technique used in tree-structured classification, on the individual data revealed that both the Turkish and German IWA’s response accuracy is largely predicted by the presence of overt and unambiguous case marking. We discuss our results with regard to different theoretical approaches to the comprehension of wh-questions in aphasia.
Effects of aging on lexical processing are well attested, but the picture is less clear for grammatical processing. Where age differences emerge, these are usually ascribed to working-memory (WM) decline. Previous studies on the influence of WM on agreement computation have yielded inconclusive results, and work on aging and subject-verb agreement processing is lacking. In two experiments (Experiment 1: timed grammaticality judgment, Experiment 2: self-paced reading + WM test), we investigated older (OA) and younger (YA) adults’ susceptibility to agreement attraction errors. We found longer reading latencies and judgment reaction times (RTs) for OAs. Further, OAs, particularly those with low WM scores, were more accepting of sentences with attraction errors than YAs. OAs showed longer reading latencies for ungrammatical sentences, again modulated by WM, than YAs. Our results indicate that OAs have greater difficulty blocking intervening nouns from interfering with the computation of agreement dependencies. WM can modulate this effect.
We examined native and non-native English speakers’ processing of indirect object wh-dependencies using a filled-gap paradigm while recording event-related potentials (ERPs). The non-native group was comprised of native German-speaking, proficient non-native speakers of English. Both participant groups showed evidence of linking fronted indirect objects to the subcategorizing verb when this was encountered, reflected in an N400 component. Evidence for continued filler activation beyond the verb was seen only in the non-native group, in the shape of a prolonged left-anterior negativity. Both participant groups showed sensitivity to filled indirect object gaps reflected in a P600 response, which was more pronounced and more globally distributed in our non-native group. Taken together, our results indicate that resolving indirect object dependencies is a two-step process in both native and non-native sentence comprehension, with greater processing cost incurred in non-native compared to native comprehension.
We report the results from an eye-movement monitoring study investigating native (L1) and non-native (L2) speakers’ real-time processing of antecedent-contained deletion (ACD), a type of verb phrase ellipsis in which the ellipsis gap forms part of its own antecedent. The resulting interpretation problem is traditionally thought to be solved by quantifier raising, a covert scope-shifting operation that serves to remove the gap from within its antecedent. Our L2 group comprised advanced, native German-speaking L2 learners of English. The analysis of the eye-movement data showed that both L1 and L2 English speakers tried to recover the missing verb phrase after encountering the gap. Only the native speakers showed evidence of ellipsis resolution being affected by quantification, however. No effects of quantification following gap detection were found in the L2 group, by contrast, indicating that recovery of the elided material was accomplished independently from the object’s quantificational status in this group.
Purpose: The purpose of this study is to investigate the effects of healthy aging on the ability to suppress grammatically illicit antecedents during pronoun resolution. Method: In 2 reading-based acceptability-judgment experiments, younger and older speakers of German read sentences containing an object pronoun and 2 potential antecedent noun phrases, only 1 of which was a grammatically licit antecedent. Using a gender-mismatch paradigm, we compared to what extent younger and older speakers were sensitive to feature (mis)matches between the pronoun and either of the 2 antecedents. All participants were fluent readers of German and had finished at least secondary education. Results: Experiment 1 used a self-paced reading paradigm. Older speakers showed greater sensitivity than younger ones to mismatching licit antecedents, but no group showed any evidence of interference from an intervening competitor antecedent. In Experiment 2, we increased the processing demand by using paced word-by-word stimulus presentation and longer sentences. Here, older participants showed reduced sensitivity, in comparison with younger people, to mismatching licit antecedents. Unlike our younger participants, they showed signs of distraction by the presence of a linearly closer but grammatically inappropriate antecedent when no appropriate antecedent was available.
Since the Shallow Structure Hypothesis (SSH) was first put forward in 2006, it has inspired a growing body of research on grammatical processing in nonnative (L2) speakers. More than 10 years later, we think it is time for the SSH to be reconsidered in the light of new empirical findings and current theoretical assumptions about human language processing. The purpose of our critical commentary is twofold: to clarify some issues regarding the SSH and to sketch possible ways in which this hypothesis might be refined and improved to better account for L1 and L2 speakers’ performance patterns.
Aims and objectives: Our study addresses the following research questions: To what extent is L2 comprehenders’ online sensitivity to morphosyntactic disambiguation cues affected by L1 background? Does noticing the error signal trigger successful reanalysis in both L1 and L2 comprehension? Can previous findings suggesting that case is a better reanalysis cue than agreement be replicated and extended to L2 processing when using closely matched materials? Design/methodology/approach: We carried out a self-paced reading study using temporarily ambiguous object-initial sentences in German. These were disambiguated either by number marking on the verb or by nominative case marking on the subject. End-of-trial comprehension questions probed whether or not our participants ultimately succeeded in computing the correct interpretation. Data and analysis: We tested a total of 121 participants (25 Italian, 32 Russian, 32 Korean and 32 native German speakers), measuring their word-by-word reading times and comprehension accuracy. The data were analysed using linear mixed-effects and logistic regression modelling. Findings/conclusions: All three learner groups showed online sensitivity to both case and agreement disambiguation cues. Noticing case disambiguations did not necessarily lead to a correct interpretation, whereas noticing agreement disambiguations did. We conclude that intermediate to advanced learners are sensitive to morphosyntactic interpretation cues during online processing regardless of whether or not corresponding grammatical distinctions exist in their L1. Our results also suggest that case is not generally a better reanalysis cue than agreement. Significance/implications: L1 influence on L2 processing is more limited than might be expected. Contra previous findings, even intermediate learners show sensitivity to both agreement and case information during processing.