Grammatical verb aspect and event roles in sentence processing

Aspectual Processing Shifts Visual Event Apprehension

What is the relationship between language and event cognition? Past work has suggested that linguistic/aspectual distinctions encoding the internal temporal profile of events map onto nonlinguistic event representations. Here, we use a novel visual detection task to directly test the hypothesis that processing telic versus atelic sentences (e.g., "Ebony folded a napkin in 10 seconds" vs. "Ebony did some folding for 10 seconds") can influence whether the very same visual event is processed as containing distinct temporal stages including a well-defined endpoint or lacking such structure, respectively. In two experiments, we show that processing (a)telicity in language shifts how people later construe the temporal structure of identical visual stimuli. We conclude that event construals are malleable representations that can align with the linguistic framing of events.

Linguistic and non-linguistic cues in motion event endpoint description: The selection between English to and towards

The current study aims to explore the factors that could affect people’s description of a motion event endpoint. The study conducted by Liao, Dijkstra, and Zwaan (2021, Language and Cognition, 13[2], 161–190) found that two non-linguistic factors (i.e., the actor’s goal and the interlocutor’s social status) affect people’s choice between two Dutch directional prepositions (i.e., naar and richting) during event description tasks. The current study aims to extend these findings by examining the choice between a similar pair of directional prepositions in English (i.e., to and towards). Moreover, we aim to study whether grammatical aspect (i.e., the English simple present and the English progressive aspect) affects the sensitivity to the two non-linguistic factors and consequently also affects how people describe a motion event endpoint. In Experiment 1, we used the English simple present for all sentence stimuli (e.g., he walks (?) the trash bin). We found a significant effect of Interlocutor (the interlocutor’s social status) on preposition choice, but no significant effect of Intention (the actor’s goal). In Experiment 2, we replaced the English simple present with the English progressive aspect (e.g., he is walking (?) the trash bin). We found significant main effects of both Interlocutor and Intention on preposition choice. These findings extend those reported in Liao et al. (2021) Language, Cognition and Neuroscience, 35(4), 498–520 in that protagonist intention and interlocutor status were found to indeed affect motion event endpoint description. The current findings furthermore show that grammatical aspect affects people’s sensitivity to these factors, thus also affecting how a motion event endpoint is described.

Grammatical Aspect and Mental Activation of Implied Instruments: A Mouse-Tracking Study in Persian

Can grammatical cues affect the way people activate event knowledge? We used mouse tracking to study the effect of grammatical aspect on the mental activation of instruments in Persian. Verb aspect is defined as how an action or event is extended over time, whether it is perfective (complete) or imperfective (incomplete). We predicted that imperfective aspect would trigger the mental activation of event knowledge, thus making participants mistakenly believe that the instrument with which the action is normally performed was present in the sentence. We tested this hypothesis using manual action verbs. Fifty female participants read a simple active sentence in which an actor had done or was doing an action (e.g., Sara has sliced/is slicing the zucchinis) with an implied instrument (knife). Then, they were presented with a picture of the implied instrument and judged whether the instrument was mentioned in the sentence they just read by clicking on the PRESENT or ABSENT response option. We predicted that participants would be less efficient at clicking ABSENT in the imperfective condition. In line with this prediction, we found that the imperfective condition caused significant deviation to the incorrect response PRESENT. However, no significant time differences emerged. The results are consistent with embodied views of language comprehension.

The state of the onion: Grammatical aspect modulates object representation during event comprehension

The present ERP study assessed whether grammatical aspect is used as a cue in online event comprehension, in particular when reading about events in which an object is visually changed. While perfective aspect cues holistic event representations, including an event's endpoint, progressive aspect highlights intermediate phases of an event. In a 2 × 3 design, participants read SVO sentences describing a change-of-state event (e.g., to chop an onion), with grammatical Aspect manipulated (perfective "chopped" vs progressive "was chopping"). Thereafter, they saw a Picture of an object either having undergone substantial state-change (SC; a chopped onion), no state-change (NSC; an onion in its original state) or an unrelated object (U; a cactus, acting as control condition). Their task was to decide whether the object in the Picture was mentioned in the sentence. We focused on N400 modulation, with ERPs time-locked to picture onset. U pictures elicited an N400 response as expected, suggesting detection of categorical mismatches in object type. For SC and NSC pictures, a whole-head follow-up analysis revealed a P300, implying people were engaged in detailed evaluation of pictures of matching objects. SC pictures received most positive responses overall. Crucially, there was an interaction of Aspect and Picture: SC pictures resulted in a higher amplitude P300 after sentences in the perfective compared to the progressive. Thus, while the perfective cued for a holistic event representation, including the resultant state of the affected object (i.e., the chopped onion) constraining object representations online, the progressive defocused event completion and object-state change. Grammatical aspect thus guided online event comprehension by cueing the visual representation(s) of an object's state.

How are mental simulations updated across sentences?

We examined how grounded mental simulations are updated when there is an implied change of shape, over the course of two (Experiment 1) and four (Experiment 2) sentences. In each preregistered experiment, 84 psychology students completed a sentence–picture verification task in which they judged as quickly and accurately as possible whether the pictured object was mentioned in the previous sentence. Participants had significantly higher accuracy scores and significantly shorter response times when pictures matched the shape implied by the previous sentence than when pictures mismatched the implied shape. These findings suggest that during language comprehension, mental simulations can be actively updated to reflect new incoming information.