The Effect of Semantic Constraint and Cloze Probability on Chinese Classifier-Noun Agreement in Aphasia Chia-Ju
1 Chou ,
Hsin-Chi
2,3 Wu ,
Chih-Ting
1 Chang ,
Jong-Ling
4,5 Fuh ,
Chia-Ying
1,6 Lee
1 Institute of Neuroscience, National Yang-Ming University, Taipei, Taiwan 4 Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan 2 Department of Rehabilitation, Taipei Tzu Chi General Hospital, Taipei, Taiwan 5 Department of Neurology, National Yang-Ming University School of Medicine, Taipei, Taiwan 3 School of Medicine, Tzu Chi University, Hualien, Taiwan 6 Institute of Linguistics, Academia Sinica, Taipei, Taiwan
Introduction
Method
• This study aims to investigate whether aphasic patients with comprehension deficits are capable of using topdown information to predict or integrate upcoming words by utilizing the characteristics of Chinese classifier-noun agreement. Chinese Classifier-noun agreement
Numeral
Strongly Constrained Weakly Constrained
3.41 4.52
Procedure
Completions (meaning, cloze) Classifier
High
Low
(hat, 96.55)
(shower cap, 3.45)
Implausible
Classifier
Noun 400ms
(book, 93.10)
(catalogue, 3.45)
Acceptability Judgment (1,3,5)
(story, 0%)
(battle field, 0%)
800ms
400ms 800ms
ERP Result: N400 (350-550 ms) to Nouns
Q’ Q
Constraint
Subjective Rating of Constraint
N’ Classifier
Noun
Participants • The aphasic patients were subdivided into high and low reading comprehension ability groups based on their reading comprehension scores on the subtest of the Chinese Concise Aphasia Test (CCAT), regardless of their syndrome classification. • Age-matched elder controls were screened for cognitive impairment using MMSE (MMSE score >=28). CCAT
Elder Control High Ability Aphasic Low Ability Aphasic
8
8
8
Age Mean SD Mean SD
↓,
Overall
56.40
15.50
11.88
11.88
11.93
7.63
2.52
0.25
0.25
0.05
56.50
13.75
11.11
10.90
10.49
7.21
2.49
1.06
0.98
1.05
Mean
57.88
11.13
6.28
7.96
7.49
SD
14.51
3.91
2.06
1.88
1.63
Conclusion • Compared to age-matched control, high ability aphasics revealed a much reduced cloze probability effect, and the low ability aphasic patients revealed no cloze probability effect at all. • The cloze probability effect on N400 may index the severity of reading comprehension deficit in aphasics.
r=0.50 Mean Amplitude Difference (µV)
N
Years of Education Reading Auditory
High Ability Aphasics
Low Ability Aphasics
Acknowledgement Score of Reading Comprehension in CCAT
This study was funded by National Science Council (MOST-101-2628-H-001-006-MY3)
Feedback and Comments: Chia-Ju Chou
[email protected]
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