The oddball effect on P3 disappears when feature relevance or feature-response mappings are unknown
The oddball effect on P3 disappears when feature relevance or feature-response mappings are unknown
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当特征相关性或特征响应映射未知时，P3 上的奇怪效应就会消失
DOI：
10.1007/s00221-018-5334-z
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发表时间：
2018
影响因子：
2
通讯作者：
Śmigasiewicz
中科院分区：
文献类型：
--
作者：
Verleger;Sassenhagen;Śmigasiewicz
与任务相关的罕见刺激相比，人类事件相关脑电图电位的 P3b 成分更大。在之前的一项研究中，当刺激-反应（S-R）映射在刺激呈现时仍未定义（稍后由反应提示提供）时，这种奇怪的效应就会大大减少。这种减少可能反映了 P3b 对传输信息的依赖，这些信息可能是任何相关信息（信息价值假设），或更具体地说，是有关如何响应的信息（S-R 链路假设）。为了区分这两个假设并澄清它们与经典刺激评估假设的差异，我们通过呈现彩色字母添加了第二个维度，颜色和字母在罕见和频繁替代之间变化。半秒后出现的响应提示在不同的块中，在 S-R 映射和相关维度（颜色或字母）方面在整个试验中是恒定的或可变的。有了部分信息，当在刺激呈现时仅知道这两个因素之一（通过在试验中保持不变）时，假设的预测会有所不同。根据S-R链接假说，奇怪效应将被消除，因为需要了解这两个因素来确定响应，但根据信息价值假说，奇怪效应只会减少，而根据刺激评估假说，奇怪效应将被完全维持。事实上，奇怪的效应只有在了解这两个因素的情况下才会发生，即，如果相关维度及其与响应的映射在整个试验中都是恒定的。这些结果证实了有关诱发 P3 反应的知识的卓越作用。
The P3b component of human event-related EEG potentials is larger with rare than frequent task-relevant stimuli. In a previous study, thisoddball effectwas much reduced when stimulus–response (S–R) mappings were still undefined at stimulus presentation (being later provided by response prompts). This reduction may reflect P3b’s dependence on transmitted information which might be any relevant information (informational value hypothesis) or, more specifically, information about how to respond (S–R link hypothesis). To distinguish between these two hypotheses and clarify their differences from classicalstimulus evaluation hypothesis, we added a second dimension by presenting colored letters, with both colors and letters varying between a rare and a frequent alternative. Response prompts, presented half a second later, were, in different blocks, constant or variable across trials with respect to S–R mapping and with respect to the relevant dimension (color or letter). With partial information, when only one of these two factors is known at stimulus presentation (by being constant across trials), the hypotheses differ in their predictions. The oddball effect will be abolished according toS–R link hypothesisbecause knowledge of both factors is needed to determine the response, but will only be reduced according toinformational value hypothesisand be fully maintained according tostimulus evaluation hypothesis. In fact, oddball effects only occurred with knowledge of both factors, i.e., if both the relevant dimension and its mapping to responses were constant across trials. These results confirm the preeminent role of knowledge about responses for eliciting P3.
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影响因子：
1.2
作者：
Verleger R;Śmigasiewicz K
通讯作者：
Śmigasiewicz K
影响因子：
3.7
作者：
Dien, J;Spencer, KM;Donchin, E
通讯作者：
Donchin, E
抽象和效应器选择性决策信号在延迟感知报告之前表现出定性独特的动态
影响因子：
5.3
作者：
Deirdre M. Twomey;S. Kelly;R. O’Connell
通讯作者：
R. O’Connell
测试 P3b 的 SâR 链接假设：S1 诱发的 P3 的奇怪效应因 S2 任务相关性的增加而减少
影响因子：
2.6
作者：
Verleger;Hamann;Asanowicz;Śmigasiewicz
通讯作者：
Śmigasiewicz
响应延迟和未知刺激-响应映射对 P3 奇怪效应的影响
影响因子：
3.7
作者：
Verleger;Grauhan;Śmigasiewicz
通讯作者：
Śmigasiewicz