Processing coordinate structures in Chinese: evidence from eye movements

Predicting syntactic structure

Prediction in language processing has been a topic of major interest in psycholinguistics for at least the last two decades, but most investigations focus on semantic rather than syntactic prediction. This review begins with a discussion of some influential models of parsing which assume that comprehenders have the ability to anticipate syntactic nodes, beginning with left-corner parsers and the garden-path model and ending with current information-theoretic approaches that emphasize online probabilistic prediction. We then turn to evidence for the prediction of specific syntactic forms, including coordinate clauses and noun phrases, verb arguments, and individual nouns, as well as studies that use morphosyntactic constraints to assess whether a specific semantic prediction has been made. The last section considers the implications of syntactic prediction for theories of language architecture and describes four avenues for future research.

The effect of contextual diversity on eye movements in Chinese sentence reading

Recent studies have demonstrated that when contextual diversity is controlled token word frequency has minimal effects on visual word recognition. With the exception of a single experiment by Plummer, Perea, & Rayner (2014, Journal of Experimental Psychology: Learning, Memory, and Cognition, 40, 275-283), those studies have examined words in isolation. The current studies address two potential limitations of the Plummer et al. experiment. First, because Plummer et al. used different sentence frames for words in different conditions, the effects might be due to uncontrolled differences on the sentences. Second, the absence of a frequency effect might be attributed to comparing higher and lower frequency words within a limited range. Three eye-tracking experiments examined effects of contextual diversity and frequency on Mandarin Chinese, a logographic language, for words embedded in the normal sentences. In Experiment 1, yoked words were rotated through the same sentence frame. Experiments 2a and 2b used a design similar to Plummer et al., which allows use of a larger sample of words to compare results between experiments with a smaller and larger difference in log frequency (0.41 and 1.06, respectively). In all three experiments, first-pass and later eye movement measures were significantly shorter for targets with higher contextual diversity than for targets with lower contextual diversity, with no effects of frequency.

The relation between thematic role computing and semantic relatedness processing during on-line sentence comprehension

Sentence comprehension involves timely computing different types of relations between its verbs and noun arguments, such as morphosyntactic, semantic, and thematic relations. Here, we used EEG technique to investigate the potential differences in thematic role computing and lexical-semantic relatedness processing during on-line sentence comprehension, and the interaction between these two types of processes. Mandarin Chinese sentences were used as materials. The basic structure of those sentences is “Noun+Verb+‘le’+a two-character word”, with the Noun being the initial argument. The verb disambiguates the initial argument as an agent or a patient. Meanwhile, the initial argument and the verb are highly or lowly semantically related. The ERPs at the verbs revealed that: relative to the agent condition, the patient condition evoked a larger N400 only when the argument and verb were lowly semantically related; however, relative to the high-relatedness condition, the low-relatedness condition elicited a larger N400 regardless of the thematic relation; although both thematic role variation and semantic relatedness variation elicited N400 effects, the N400 effect elicited by the former was broadly distributed and reached maximum over the frontal electrodes, and the N400 effect elicited by the latter had a posterior distribution. In addition, the brain oscillations results showed that, although thematic role variation (patient vs. agent) induced power decreases around the beta frequency band (15–30 Hz), semantic relatedness variation (low-relatedness vs. high-relatedness) induced power increases in the theta frequency band (4–7 Hz). These results suggested that, in the sentence context, thematic role computing is modulated by the semantic relatedness between the verb and its argument; semantic relatedness processing, however, is in some degree independent from the thematic relations. Moreover, our results indicated that, during on-line sentence comprehension, thematic role computing and semantic relatedness processing are mediated by distinct neural systems.