Imperfective aspect underspecified for number: Evidence from an eye-tracking during reading experiment

Abstract

Abstract In an eye-tracking during reading experiment we investigated the processing of ambiguous Polish imperfective verbs in contexts with disambiguating (‘frequently’ and ‘yesterday’) and neutral preceding adverbs. Grammatical number of NP objects was also manipulated. Verb regions received significantly longer regression path times when following a neutral compared to 'yesterday' contexts. This implies that in neutral contexts both senses of polysemous imperfective verbs are activated on the verbal region. Post-hoc analyses revealed more regressions from singular objects in neutral contexts, suggesting that a preference for a more frequent plural event sense was created before the first fixations on the object were made. Finally, we observed an effect consisting of longer first pass times on singular objects and more regressions from the following region in contexts with ‘frequently’, which is consistent with the view that imperfective aspect is underspecified for number. This pattern of results is compatible with Relevance Theory, which posits that the selection of one sense (single ongoing or plural) is an outcome of an inferential process based on frequency, context and world knowledge. However, the fact that sense frequency plays a role in this process indicates that it serves as input to context-based inferential processes suggesting that this information is pre-stored in the memory.