View Full Document

Drawing Inferences During Discourse Comprehension



View the full content.
View Full Document
View Full Document

3 views

Unformatted text preview:

Drawing Inferences During Discourse Comprehension An ERP Study Martin Paczynski1 Tali Ditman1 Kana Okano1 Gina R Kuperberg1 2 1Tufts Introduction Understanding discourse involves going beyond what is explicitly stated in text Readers draw inferences to establish causal referential spatial and temporal coherence Causal coherence involves establishing cause and effect relationships between events Electrophysiologically the cost of establishing coherence during online comprehension is reflected by a larger N400 to words that are unrelated compared to related to their preceding discourse context In healthy adults sentences that are related through the generation of a causal inference are better recalled than those that do not involve a causal inference e g Keenan Baillet Brown 1987 Myers Shinjo Duffy 1987 Trabasso van den Broek 1985 We hypothesized that the process of inference generation would result in an online processing cost to intermediately related inference requiring scenarios relative to highly related scenarios To test this hypothesis we employed ERPs to examine the time course of generating causal bridging inferences during online discourse comprehension Three sentence scenarios were created and rotated through three conditions that varied in their causal relatedness highly related intermediately related and unrelated conditions Importantly because the N400 is modulated by lexico semantic association between content words all three conditions were matched on strength of lexico semantic associations across words using a latent semantic analysis This enabled us to examine purely discourse level processing University Medford MA 2Massachusetts General Hospital Charlestown MA Table 1 Behavioral Data Figure 4 ERP for CWs Percentage of ratings Rating 1 Easy to integrate Rating 2 Intermediately difficulty in integrating Rating 3 Difficult to integrate Scenario type Mean rating Highly related 1 13 0 07 88 6 1 11 5 9 1 1 3 Intermediately related 1 81 0 19 29 16 1 61 16



Access the best Study Guides, Lecture Notes and Practice Exams

Loading Unlocking...
Login

Join to view Drawing Inferences During Discourse Comprehension and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view Drawing Inferences During Discourse Comprehension and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?