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Psychopathy and language processing: an event-related potential (ERP) investigation Kiehl, Kent Anthony
Abstract
Three experiments tested the hypothesis that psychopathy is associated with abnormal processing of semantic and affective verbal information. Experiments 1 and 2 investigated the ability of psychopaths to show behavioral and event-related potential (ERP) differentiation for concrete and abstract words. The relevant ERP components of the nonpsychopaths differentiated concrete and abstract words in a pattern consistent to that found with noncriminals. In contrast, psychopaths were less accurate than nonpsychopaths when categorizing abstract words and they failed to demonstrate the appropriate neural differentiation between concrete and abstract words. Experiment 3 explored the ability of psychopaths and nonpsychopaths to discriminate between words that differed in emotional polarity. Both groups responded faster to positive than to negative words. However, in nonpsychopaths the early (P200) and late components (P300 and Late Positive Complex) of the ERP were larger for the negative words than positive words. Psychopaths failed to show any ERP differentiation between positive and negative words. Additionally, in all three experiments, the ERPs of the psychopaths were characterized by a large centro-frontal negative-going wave in the 300 - 500 ms time window (N350). The functional significance of this large negative wave and related findings for understanding psychopathy are discussed.
Item Metadata
Title |
Psychopathy and language processing: an event-related potential (ERP) investigation
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1996
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Description |
Three experiments tested the hypothesis that psychopathy is associated with
abnormal processing of semantic and affective verbal information. Experiments 1 and 2
investigated the ability of psychopaths to show behavioral and event-related potential
(ERP) differentiation for concrete and abstract words. The relevant ERP components of
the nonpsychopaths differentiated concrete and abstract words in a pattern consistent to
that found with noncriminals. In contrast, psychopaths were less accurate than
nonpsychopaths when categorizing abstract words and they failed to demonstrate the
appropriate neural differentiation between concrete and abstract words. Experiment 3
explored the ability of psychopaths and nonpsychopaths to discriminate between words
that differed in emotional polarity. Both groups responded faster to positive than to
negative words. However, in nonpsychopaths the early (P200) and late components
(P300 and Late Positive Complex) of the ERP were larger for the negative words than
positive words. Psychopaths failed to show any ERP differentiation between positive and
negative words. Additionally, in all three experiments, the ERPs of the psychopaths were
characterized by a large centro-frontal negative-going wave in the 300 - 500 ms time
window (N350). The functional significance of this large negative wave and related
findings for understanding psychopathy are discussed.
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Extent |
2877614 bytes
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Genre | |
Type | |
File Format |
application/pdf
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Language |
eng
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Date Available |
2009-02-17
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0087231
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
1996-11
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.