Examining Anaphor Resolution Using Event-Related Potentials
This presentation is the property of its rightful owner.
Sponsored Links
1 / 2

Introduction Language comprehension involves: Coherence Cohesion PowerPoint PPT Presentation


  • 62 Views
  • Uploaded on
  • Presentation posted in: General

Examining Anaphor Resolution Using Event-Related Potentials Tali Ditman 1 , Phillip J. Holcomb 1 , & Gina R. Kuperberg 2 Tufts University, Medford, MA 1 ; Massachusetts General Hospital, Charlestown, MA 2. Introduction Language comprehension involves: Coherence Cohesion

Download Presentation

Introduction Language comprehension involves: Coherence Cohesion

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Introduction language comprehension involves coherence cohesion

Examining Anaphor Resolution Using Event-Related PotentialsTali Ditman1, Phillip J. Holcomb1, & Gina R. Kuperberg2Tufts University, Medford, MA1; Massachusetts General Hospital, Charlestown, MA2

  • Introduction

  • Language comprehension involves:

    • Coherence

    • Cohesion

  • Anaphors are words that refer back to previously presented words, or antecedents

  • How do people use context to link anaphor with its correct antecedent?

    • Gernsbacher (1989):

      • Enhancement of correct antecedent

      • Active suppression of incorrect antecedent

  • Predictions:

    • Correct antecedent easier to integrate into preceding context (smaller N400 to correct antecedent)

    • More difficult sentence wrap-up with incorrect antecedent (larger N400 at final word)

Figure 3 – Responses to Probe:

Are participants resolving anaphor? Yes!

Figure 6– Final word: The ring wasattractive.

-- Correct

-- Control

-- Incorrect

FPz

FP2

FP1

F7

F3

Fz

F4

F8

FC1

FC2

FC6

FC5

Cz

T4

T3

C3

C4

CP5

CP2

CP1

CP6

Pz

T5

P3

P4

T6

Oz

O1

O2

CP2

  • Method

  • 16 right-handed native English speaking participants (9 female, 21.25 years)

  • ERPs measured at 32 sites (see Figure 1)

  • 126 scenarios (see Figure 2 for example)

    • First 3 sentences self-paced and presented potential antecedents (e.g., ring, bracelet, nightgown), two of which were lexically related to the anaphor

    • Fourth sentence presented word-by-word and ended with the anaphor

    • Fifth sentence presented word-by-word and always started with the correct (lexically appropriate, context appropriate), incorrect (lexically appropriate, context inappropriate), or control (lexically inappropriate, context inappropriate) antecedent

    • Participants were asked to decide whether probe word was referred to by the anaphor

P< .05

Figure 7– Response to Probe – 1st half vs 2nd half

Figure 4 – RT to Probe

No ERP differences at final word but could this be due to the strategy use over the course of the experiment?


Introduction language comprehension involves coherence cohesion

FP1

FP1

FPz

FPz

FP2

FP2

FP1

FPz

FP2

F4

F4

F8

F7

Fz

F3

F7

F4

Fz

F8

F3

FC6

FC1

FC2

FC5

C4

T4

C3

Cz

T3

FC6

FC5

FC1

FC2

CP2

CP6

CP1

CP5

T3

C3

Cz

T4

C4

P3

P4

T5

Pz

T6

CP1

CP5

CP2

CP6

Oz

O2

O1

T5

P3

Pz

P4

T6

FP2

FP1

FPz

Oz

O1

O2

Figure 2–Scenario

F7

F3

F4

Fz

F8

FC1

FC2

FC6

FC5

A ring is worn on a finger.

A bracelet is worn on a wrist.

A nightgown is worn to sleep.

Lisa’s finger sparkled with the jewelry.

The ring was attractive.

The bracelet was attractive.

The nightgown was attractive.

PROBE: RING

T3

C4

C3

Cz

T4

ANAPHOR

CP1

CP5

CP2

CP6

T5

P3

Pz

P4

T6

O1

Oz

O2

Figure 8– Final word – 1st Half of Experiment

Figure 1 – Electrode Montage

Figure 5– Resolution word:The ringwas attractive.

Fz

A left anterior negativity (LAN), thought to reflect working memory load (King & Kutas, 1995), was found in sentences with incorrect antecedents only in the second half, during which performance on the incorrect probe was significantly improved from the first half.

Figure 9– Final word – 2nd Half of Experiment

-- Correct

-- Control

-- Incorrect

Fz

CP2

The smallest N400 was elicited by the correct antecedent and the largest N400 was elicited by the control.

References

Gernsbacher (1989). Mechanisms that improve referential access. Cognition, 32(2), 99-156.

King, J. W., & Kutas, M. (1995). Who did what and when? Using word- and clause-level ERPs to monitor working memory usage during reading. Journal of Cognitive Neuroscience, 7, 376-395.

  • Discussion

  • Immediately following anaphor resolution, a correct antecedent is more easily integrated into its preceding context.

  • After anaphor resolution, processing an incorrect antecedent may involve an increased working memory load.

  • Future directions will further examine the effect of working memory and strategy use on anaphor resolution, as well as the time course of this effect.

Phillip J. Holcomb was supported by NICHD (HD25889 and HD043251).

Gina R. Kuperberg was supported by NIMH (K23 MH02034), NARSAD (with the Sidney Baer Trust), and by the Institute for Mental Illness and Neuroscience Discovery (MIND).


  • Login