Filtern
Volltext vorhanden
- nein (13)
Dokumenttyp
Sprache
- Englisch (13)
Gehört zur Bibliographie
- ja (13) (entfernen)
Schlagworte
- Sentence processing (13) (entfernen)
Institut
Three eye movement experiments investigated the interaction between contextual and lexical focus cues during reading. Context was used to focus on either the indirect or direct object of a double object construction, which was followed by a remnant continuation that formed either a congruous or incongruous contrast with the contextually focused object. Experiment 1 demonstrated that remnants were more difficult to process when incongruous with the contextually focused constituent, indicating that context was effective in specifying focus. Experiments 2 and 3 investigated the interaction between context and lexical focus arising from the particle only which specifies focus on the subsequent adjacent element. When only preceded both objects (Experiment 2), the conflict between lexical and contextual focus cues disrupted processing of the remnant element and was resolved in favour of the contextually focused element. However, when only was placed between both objects (Experiment 3), cue-conflict disrupted processing earlier in the sentence but did not appear to be fully resolved during on-line sentence processing. These findings reveal that the interplay between contextual and lexical cues to focus is important for establishing focus structure during on-line sentence processing.
False positives and other statistical errors in standard analyses of eye movements in reading
(2017)
In research on eye movements in reading, it is common to analyze a number of canonical dependent measures to study how the effects of a manipulation unfold over time. Although this gives rise to the well-known multiple comparisons problem, i.e. an inflated probability that the null hypothesis is incorrectly rejected (Type I error), it is accepted standard practice not to apply any correction procedures. Instead, there appears to be a widespread belief that corrections are not necessary because the increase in false positives is too small to matter. To our knowledge, no formal argument has ever been presented to justify this assumption. Here, we report a computational investigation of this issue using Monte Carlo simulations. Our results show that, contrary to conventional wisdom, false positives are increased to unacceptable levels when no corrections are applied. Our simulations also show that counter-measures like the Bonferroni correction keep false positives in check while reducing statistical power only moderately. Hence, there is little reason why such corrections should not be made a standard requirement. Further, we discuss three statistical illusions that can arise when statistical power is low, and we show how power can be improved to prevent these illusions. In sum, our work renders a detailed picture of the various types of statistical errors than can occur in studies of reading behavior and we provide concrete guidance about how these errors can be avoided. (C) 2016 Elsevier Inc. All rights reserved.
We used event-related potentials (ERPs) to investigate the neurocognitive mechanisms associated with processing light verb constructions such as "give a kiss". These constructions consist of a semantically underspecified light verb ("give") and an event nominal that contributes most of the meaning and also activates an argument structure of its own ("kiss"). This creates a mismatch between the syntactic constituents and the semantic roles of a sentence. Native speakers read German verb-final sentences that contained light verb constructions (e.g., "Julius gave Anne a kiss"), non-light constructions (e.g., "Julius gave Anne a rose"), and semantically anomalous constructions (e.g., 'Julius gave Anne a conversation"). ERPs were measured at the critical verb, which appeared after all its arguments. Compared to non-light constructions, the light verb constructions evoked a widely distributed, frontally focused, sustained negative-going effect between 500 and 900 ms after verb onset. We interpret this effect as reflecting working memory costs associated with complex semantic processes that establish a shared argument structure in the light verb constructions.