Personal significance is encoded automatically by the human brain:: an event-related potential study with ringtones
Personal significance is encoded automatically by the human brain:: an event-related potential study with ringtones
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DOI：
10.1111/j.1460-9568.2007.05685.x
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发表时间：
2007-08-01
影响因子：
3.4
通讯作者：
Schroeger, Erich
中科院分区：
文献类型：
--
作者：
Roye, Anja;Jacobsen, Thomas;Schroeger, Erich
在这项与人类事件相关的大脑电位（ERP）研究中，我们使用一个人的个人铃声（相对于另一个人的铃声）以两种偏差的被动奇怪范式呈现，以研究声音的自我选择的个人意义对自动偏差检测和非自愿注意系统的长期记忆影响。我们的研究结果扩展了对语音、音乐和环境声音领域通常以小组方法报告的长期影响的认识。与标准刺激相比，除了异常者引起的通常的失配负性（MMN）和 P3a 成分之外，我们还观察到仅针对个人显着的异常者直接跟随 MMN 的后部 ERP 偏转。这种对个人意义的特定影响在声音出现后 200 毫秒左右开始，涉及与单纯的物理偏差检测机制不同的神经发生器。虽然 P3a 成分的早期部分不受个人重要性的影响，但后期 P3a 因 ERP 而增强至个人显着偏差，表明这种刺激在不由自主地吸引注意力方面更有力。在无意识的注意力转换之后，对个人有意义的刺激引起了广泛分布的负偏转，这可能反映了对重要声音的进一步分析，包括评估相关性或重新定位到主要任务。我们的数据显示，手机和短信技术已发展成为现代世界的主要通信媒介，其对个人的意义促进了个人记忆表征的形成，从而影响了对不属于关注焦点的声音的处理。
In this human event-related brain potential (ERP) study, we have used one's personal - relative to another person's - ringtone presented in a two-deviant passive oddball paradigm to investigate the long-term memory effects of self-selected personal significance of a sound on the automatic deviance detection and involuntary attention system. Our findings extend the knowledge of long-term effects usually reported in group-approaches in the domains of speech, music and environmental sounds. In addition to the usual mismatch negativity (MMN) and P3a component elicited by deviants in contrast to standard stimuli, we observed a posterior ERP deflection directly following the MMN for the personally significant deviant only. This specific impact of personal significance started around 200 ms after sound onset and involved neural generators that were different from the mere physical deviance detection mechanism. Whereas the early part of the P3a component was unaffected by personal significance, the late P3a was enhanced for the ERPs to the personal significant deviant suggesting that this stimulus was more powerful in attracting attention involuntarily. Following the involuntary attention switch, the personally significant stimulus elicited a widely-distributed negative deflection, probably reflecting further analysis of the significant sound involving evaluation of relevance or reorienting to the primary task. Our data show, that the personal significance of mobile phone and text message technology, which have developed as a major medium of communication in our modern world, prompts the formation of individual memory representations, which affect the processing of sounds that are not in the focus of attention.