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Related Experiment Video

Updated: Apr 30, 2026

Dissociation of the Confounding Influences of Expectancy and Integrative Difficulty Residing in Anomalous Sentences in Event-related Potential Studies
05:22

Dissociation of the Confounding Influences of Expectancy and Integrative Difficulty Residing in Anomalous Sentences in Event-related Potential Studies

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[Contingent negative variation: a brainwave associated with expectation].

Juan Zuo, Junhao Xiong, Yongjian Li

    Sheng Wu Yi Xue Gong Cheng Xue Za Zhi = Journal of Biomedical Engineering = Shengwu Yixue Gongchengxue Zazhi
    |May 9, 2014
    PubMed
    Summary
    This summary is machine-generated.

    The contingent negative variation (CNV) brain response can reflect subject expectations. Researchers found that CNV amplitude is influenced by task-relevant signals, indicating its potential as an electrophysiological index for expected value.

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    Area of Science:

    • Neuroscience
    • Cognitive Psychology
    • Electrophysiology

    Background:

    • The contingent negative variation (CNV) is an electrophysiological signal associated with anticipation.
    • Understanding the factors influencing CNV amplitude is crucial for its interpretation.

    Purpose of the Study:

    • To investigate whether the contingent negative variation (CNV) can serve as an electrophysiological index of expectation.
    • To explore the relationship between task-related signals and CNV amplitude.

    Main Methods:

    • Utilized Go/No Go and no-motion tasks incorporating contingent negative variation (CNV) paradigms.
    • Compared CNV data across different experimental conditions.

    Main Results:

    • The presence of warning and command signals was critical for evoking the CNV.
    • The relevance of the command signal to the task significantly impacted CNV amplitude.
    • These CNV characteristics correlated with participants' expectations.

    Conclusions:

    • The contingent negative variation (CNV) reflects the expectation of subjects under specific experimental conditions.
    • CNV can be utilized as an electrophysiological index to measure expected value.