Dissociating N400 effects of prediction from association in single-word contexts.
Dissociating N400 effects of prediction from association in single-word contexts.
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DOI：
10.1162/jocn_a_00328
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发表时间：
2013-03
影响因子：
3.2
通讯作者：
Kuperberg GR
中科院分区：
文献类型：
--
作者：
Lau EF;Holcomb PJ;Kuperberg GR
当一个单词前面有支持性上下文（例如语义相关的单词或强约束性句子框架）时，ERP 的 N400 分量的幅度会减小。一个持续的争论是，这种减少在多大程度上反映了长期语义记忆表征中激活的被动传播，而不是对即将到来的输入的具体预测。我们通过将语义相关的主要目标对嵌入到实验环境中来解决这个问题，从而或多或少地鼓励预测。相关项目的比例用于操纵素数对目标的预测有效性，同时保持语义关联不变。语义类别探测检测任务用于鼓励语义处理并排除对感兴趣的试验进行运动反应的需要。在高相关性比例条件下观察到相关目标的 N400 减少幅度大于低相关性比例条件，这与对即将到来的刺激的预测对 N400 效应做出重大贡献的假设一致。我们还在高比例条件下观察到较早的启动效应（205-240 ms），这可能反映了基于形式的预测带来的促进作用。总之，结果表明可预测性对 N400 幅度的调节程度大于上下文的语义内容。
When a word is preceded by a supportive context such as a semantically associated word or a strongly constraining sentence frame, the N400 component of the ERP is reduced in amplitude. An ongoing debate is the degree to which this reduction reflects a passive spread of activation across long-term semantic memory representations as opposed to specific predictions about upcoming input. We addressed this question by embedding semantically associated prime-target pairs within an experimental context that encouraged prediction to a greater or lesser degree. The proportion of related items was used to manipulate the predictive validity of the prime for the target while holding semantic association constant. A semantic category probe detection task was used to encourage semantic processing and to preclude the need for a motor response on the trials of interest. A larger N400 reduction to associated targets was observed in the high than the low relatedness proportion condition, consistent with the hypothesis that predictions about upcoming stimuli make a substantial contribution to the N400 effect. We also observed an earlier priming effect (205–240 ms) in the high proportion condition, which may reflect facilitation due to form-based prediction. In sum, the results suggest that predictability modulates N400 amplitude to a greater degree than the semantic content of the context.
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影响因子：
2.5
作者：
Federmeier, Kara D.;Kutas, Marta;Schul, Rina
通讯作者：
Schul, Rina
影响因子：
2.5
作者：
Brown, CM;Hagoort, P;Chwilla, DJ
通讯作者：
Chwilla, DJ
DOI：
10.1080/01690960601057126
发表时间：
2007-01-01
期刊：
LANGUAGE AND COGNITIVE PROCESSES
影响因子：
--
作者：
Ditman, Tali;Holcomb, Phillip J.;Kuperberg, Gina R.
通讯作者：
Kuperberg, Gina R.
影响因子：
4.3
作者：
Camblin, C. Christine;Gordon, Peter C.;Swaab, Tamara Y.
通讯作者：
Swaab, Tamara Y.
DOI：
10.1016/s0926-6410(98)00034-2
发表时间：
1999-03-01
期刊：
COGNITIVE BRAIN RESEARCH
影响因子：
--
作者：
Deacon, D;Uhm, TJ;Dynowska, A
通讯作者：
Dynowska, A