![Page 1: Right hemisphere sensitivity to word & sentence level context: Evidence From Event-Related Brain Potentials. Coulson, S. Federmeier, K.D., Van Petten,](https://reader036.vdocument.in/reader036/viewer/2022062308/56649ef65503460f94c094cf/html5/thumbnails/1.jpg)
Right hemisphere sensitivity to word & sentence level context: Evidence From Event-Related Brain Potentials.
Coulson, S. Federmeier, K.D., Van Petten, C., and Kutas, M. (2005)
JEP: Learning, Memory, and Cognition.
![Page 2: Right hemisphere sensitivity to word & sentence level context: Evidence From Event-Related Brain Potentials. Coulson, S. Federmeier, K.D., Van Petten,](https://reader036.vdocument.in/reader036/viewer/2022062308/56649ef65503460f94c094cf/html5/thumbnails/2.jpg)
Gist
Question: Is right hemisphere message blind? Measurement: ERP Paradigm: associate priming without/within
sentence context Answer: RH is not message blind, but there is
indeed hemispheric asymmetries in the use of word and sentence contexts
![Page 3: Right hemisphere sensitivity to word & sentence level context: Evidence From Event-Related Brain Potentials. Coulson, S. Federmeier, K.D., Van Petten,](https://reader036.vdocument.in/reader036/viewer/2022062308/56649ef65503460f94c094cf/html5/thumbnails/3.jpg)
Message-blind RH --the hypothesis
LH
has the ability to integrate syntactic, semantic, and pragmatic information to construct a message-level representation of meaning.
RH its language competence extends only to word-level priming mechanisms
![Page 4: Right hemisphere sensitivity to word & sentence level context: Evidence From Event-Related Brain Potentials. Coulson, S. Federmeier, K.D., Van Petten,](https://reader036.vdocument.in/reader036/viewer/2022062308/56649ef65503460f94c094cf/html5/thumbnails/4.jpg)
Message-blind RH --why people made this claim?
LH priming in RT to words embedded in
normal or scrambled sentences (Faust et al. 1995)
Larger priming effect when the amount of context is increased (Faust et al. 1993)
Longer RT to words in implausible sentence context than plausible context (Faust, 1998)
RH Contexts do not seem to facilitate or
hinder the language process
so…RH seems to be blind to these message level information..
![Page 5: Right hemisphere sensitivity to word & sentence level context: Evidence From Event-Related Brain Potentials. Coulson, S. Federmeier, K.D., Van Petten,](https://reader036.vdocument.in/reader036/viewer/2022062308/56649ef65503460f94c094cf/html5/thumbnails/5.jpg)
Message-blind RH --however…..
LH RH Should be sensitive to some
message level information, since when RH is damaged
patients cannot understand certain kinds of jokes, metaphoric language, and sarcastic utterances
Some studies did find sentence congruity effect in the RH (Chiarello, Liu, & Faust, 2001; Faust, Bar-lev, & Chiarello, 2003)
![Page 6: Right hemisphere sensitivity to word & sentence level context: Evidence From Event-Related Brain Potentials. Coulson, S. Federmeier, K.D., Van Petten,](https://reader036.vdocument.in/reader036/viewer/2022062308/56649ef65503460f94c094cf/html5/thumbnails/6.jpg)
Ex1 [word level context effect]Lexical association
Ex2 [sentence level context effect]Lexical associationSentence congruity
![Page 7: Right hemisphere sensitivity to word & sentence level context: Evidence From Event-Related Brain Potentials. Coulson, S. Federmeier, K.D., Van Petten,](https://reader036.vdocument.in/reader036/viewer/2022062308/56649ef65503460f94c094cf/html5/thumbnails/7.jpg)
Experimental design (EX1)
Associated Unassociated
Congruous
They were truly stuck, since she didn’t have a spare TIRE.
… Ellen leaned over and borrowed my spare PENCIL.
Incongruous
… Ellen leaned over and borrowed my spare TIRE.
They were truly stuck, since she didn’t have a spare PENCIL.
Primes are centrally presented, and
targets are lateralized to either visual field (split visual field display).
![Page 8: Right hemisphere sensitivity to word & sentence level context: Evidence From Event-Related Brain Potentials. Coulson, S. Federmeier, K.D., Van Petten,](https://reader036.vdocument.in/reader036/viewer/2022062308/56649ef65503460f94c094cf/html5/thumbnails/8.jpg)
![Page 9: Right hemisphere sensitivity to word & sentence level context: Evidence From Event-Related Brain Potentials. Coulson, S. Federmeier, K.D., Van Petten,](https://reader036.vdocument.in/reader036/viewer/2022062308/56649ef65503460f94c094cf/html5/thumbnails/9.jpg)
SPLIT VISUAL FIELD DISPLAY
![Page 10: Right hemisphere sensitivity to word & sentence level context: Evidence From Event-Related Brain Potentials. Coulson, S. Federmeier, K.D., Van Petten,](https://reader036.vdocument.in/reader036/viewer/2022062308/56649ef65503460f94c094cf/html5/thumbnails/10.jpg)
SPLIT VISUAL FIELD DISPLAY
![Page 11: Right hemisphere sensitivity to word & sentence level context: Evidence From Event-Related Brain Potentials. Coulson, S. Federmeier, K.D., Van Petten,](https://reader036.vdocument.in/reader036/viewer/2022062308/56649ef65503460f94c094cf/html5/thumbnails/11.jpg)
PROCEDURE
++++
200ms
200ms
1000~1200ms
300ms
2500ms
spare
tire
?
0ms
![Page 12: Right hemisphere sensitivity to word & sentence level context: Evidence From Event-Related Brain Potentials. Coulson, S. Federmeier, K.D., Van Petten,](https://reader036.vdocument.in/reader036/viewer/2022062308/56649ef65503460f94c094cf/html5/thumbnails/12.jpg)
Prediction
Ex1[word level context effect]Since both hemispheres are sensitive
to word level info, similar-sized N400 context effects are expected
![Page 13: Right hemisphere sensitivity to word & sentence level context: Evidence From Event-Related Brain Potentials. Coulson, S. Federmeier, K.D., Van Petten,](https://reader036.vdocument.in/reader036/viewer/2022062308/56649ef65503460f94c094cf/html5/thumbnails/13.jpg)
Experiment 1—results
![Page 14: Right hemisphere sensitivity to word & sentence level context: Evidence From Event-Related Brain Potentials. Coulson, S. Federmeier, K.D., Van Petten,](https://reader036.vdocument.in/reader036/viewer/2022062308/56649ef65503460f94c094cf/html5/thumbnails/14.jpg)
EX1
LVF/rh
![Page 15: Right hemisphere sensitivity to word & sentence level context: Evidence From Event-Related Brain Potentials. Coulson, S. Federmeier, K.D., Van Petten,](https://reader036.vdocument.in/reader036/viewer/2022062308/56649ef65503460f94c094cf/html5/thumbnails/15.jpg)
EX1
LVF/rh
N400LPC
![Page 16: Right hemisphere sensitivity to word & sentence level context: Evidence From Event-Related Brain Potentials. Coulson, S. Federmeier, K.D., Van Petten,](https://reader036.vdocument.in/reader036/viewer/2022062308/56649ef65503460f94c094cf/html5/thumbnails/16.jpg)
EX1
RVF/lh
![Page 17: Right hemisphere sensitivity to word & sentence level context: Evidence From Event-Related Brain Potentials. Coulson, S. Federmeier, K.D., Van Petten,](https://reader036.vdocument.in/reader036/viewer/2022062308/56649ef65503460f94c094cf/html5/thumbnails/17.jpg)
Experimental design (EX2)
Associated Unassociated
Congruous
They were truly stuck, since she didn’t have a spare TIRE.
… Ellen leaned over and borrowed my spare PENCIL.
Incongruous
… Ellen leaned over and borrowed my spare TIRE.
They were truly stuck, since she didn’t have a spare PENCIL.
The cloze probability were matched between the two types of congruous sentences (associated & unassociated) and also between the two types of incongruous sentences. This was done to ensure that the message level constraints are similar in the associated and unassociated conditions.
![Page 18: Right hemisphere sensitivity to word & sentence level context: Evidence From Event-Related Brain Potentials. Coulson, S. Federmeier, K.D., Van Petten,](https://reader036.vdocument.in/reader036/viewer/2022062308/56649ef65503460f94c094cf/html5/thumbnails/18.jpg)
Prediction
Ex1[word level context effect] Since both hemispheres are sensitive to
word level info, similar-sized N400 context effects are expected
Ex2[sentence level context effect] LH:
• A large N400 congruity effect• Negligible effects of association
RH: (if the message blind RH model holds)• A large N400 association effect• Negligible effects of context congruity
![Page 19: Right hemisphere sensitivity to word & sentence level context: Evidence From Event-Related Brain Potentials. Coulson, S. Federmeier, K.D., Van Petten,](https://reader036.vdocument.in/reader036/viewer/2022062308/56649ef65503460f94c094cf/html5/thumbnails/19.jpg)
Experiment 2—results
![Page 20: Right hemisphere sensitivity to word & sentence level context: Evidence From Event-Related Brain Potentials. Coulson, S. Federmeier, K.D., Van Petten,](https://reader036.vdocument.in/reader036/viewer/2022062308/56649ef65503460f94c094cf/html5/thumbnails/20.jpg)
N400LPC
EX2
LVF/rh
![Page 21: Right hemisphere sensitivity to word & sentence level context: Evidence From Event-Related Brain Potentials. Coulson, S. Federmeier, K.D., Van Petten,](https://reader036.vdocument.in/reader036/viewer/2022062308/56649ef65503460f94c094cf/html5/thumbnails/21.jpg)
N400LPC
EX2
RVF/lh
![Page 22: Right hemisphere sensitivity to word & sentence level context: Evidence From Event-Related Brain Potentials. Coulson, S. Federmeier, K.D., Van Petten,](https://reader036.vdocument.in/reader036/viewer/2022062308/56649ef65503460f94c094cf/html5/thumbnails/22.jpg)
Summary
word level: association effects for both LVF/rh and RVF/lh presentation
sentence level: robust congruity effects for both LVF/rh and RVF/lh presentation
the message-blind RH model is not supported
At the sentence level, the congruity effect lead to a dramatic attenuation of the association effect.Lexical context is less important in sentence
contexts
![Page 23: Right hemisphere sensitivity to word & sentence level context: Evidence From Event-Related Brain Potentials. Coulson, S. Federmeier, K.D., Van Petten,](https://reader036.vdocument.in/reader036/viewer/2022062308/56649ef65503460f94c094cf/html5/thumbnails/23.jpg)
5 µV
Association effect
Association effect
Congruity effect
unassociated
associated
unassociated
associated
incongruous
congruous
![Page 24: Right hemisphere sensitivity to word & sentence level context: Evidence From Event-Related Brain Potentials. Coulson, S. Federmeier, K.D., Van Petten,](https://reader036.vdocument.in/reader036/viewer/2022062308/56649ef65503460f94c094cf/html5/thumbnails/24.jpg)
Summary
Although both hemispheres make use of word level as well as sentence level contexts, they seem to use them in different ways.
LH seems to make use of lexical association only when the sentence context is incongruous.
RH shows a smaller lexical association effect at the word level, which suggests that RH might be weaker to use this source of semantic context.
RH shows the association effect in congruous sentences there might be a greater reliance on word level relationships in the lexical integration processes in understanding sentences
![Page 25: Right hemisphere sensitivity to word & sentence level context: Evidence From Event-Related Brain Potentials. Coulson, S. Federmeier, K.D., Van Petten,](https://reader036.vdocument.in/reader036/viewer/2022062308/56649ef65503460f94c094cf/html5/thumbnails/25.jpg)
Questions
Is the LPC the same thing as the P600? Do blinks also produce surges that might overshadow brain activity
on the EEG? How common is subject attrition due to excessive artifacts? Onset or peak? Which point is more interesting? In what situations
would one or the other be the focus? What if they ran their experiments on brain damaged patients ? Why was a naming paradigm chosen for the target as opposed
lexical decision? Great Britain norms vs. US participants ….isn’t it problematic? Is the hemispheric asymmetry in reliance on lexical relationships
has to do with other abilities commonly associated with RH function (e.g., spatial abilities).
![Page 26: Right hemisphere sensitivity to word & sentence level context: Evidence From Event-Related Brain Potentials. Coulson, S. Federmeier, K.D., Van Petten,](https://reader036.vdocument.in/reader036/viewer/2022062308/56649ef65503460f94c094cf/html5/thumbnails/26.jpg)
Other questions?
![Page 27: Right hemisphere sensitivity to word & sentence level context: Evidence From Event-Related Brain Potentials. Coulson, S. Federmeier, K.D., Van Petten,](https://reader036.vdocument.in/reader036/viewer/2022062308/56649ef65503460f94c094cf/html5/thumbnails/27.jpg)
![Page 28: Right hemisphere sensitivity to word & sentence level context: Evidence From Event-Related Brain Potentials. Coulson, S. Federmeier, K.D., Van Petten,](https://reader036.vdocument.in/reader036/viewer/2022062308/56649ef65503460f94c094cf/html5/thumbnails/28.jpg)
![Page 29: Right hemisphere sensitivity to word & sentence level context: Evidence From Event-Related Brain Potentials. Coulson, S. Federmeier, K.D., Van Petten,](https://reader036.vdocument.in/reader036/viewer/2022062308/56649ef65503460f94c094cf/html5/thumbnails/29.jpg)
ELECTRODE POSITIONS