Leynes P Andrew, Crawford Cailin J
The College of New Jersey, United States.
The College of New Jersey, United States.
Brain Cogn. 2018 Nov;127:42-50. doi: 10.1016/j.bandc.2018.09.005. Epub 2018 Sep 22.
Event-related potential (ERP) evidence suggests that encoding focus alters the quality of information bound in memory, which can affect source memory. In the present study, participants studied product images with blue or and yellow filters while focusing either on the self (self-focus) or on the color of the filtered image (other-focus). Self-focus encoding produced more positive encoding ERPs, greater recognition for old/new judgments, and a greater Late Positive Component (LPC; the putative neural correlate for recollection). Other-focus encoding led to a greater FN400 component suggesting that features (i.e., filter color and product image) were unitized and increased the familiarity used to make memory judgments. The results indicate that encoding focus can alter the balance of features bound in memory. Some features support a specific memory query (diagnostic recollection), whereas other features are from the past do not necessarily inform the memory query (non-diagnostic recollection). Thus, recollection is a complex process that depends on interactions between encoding processes, characteristics of the encountered information, and the broad context of the memory probe.
与事件相关的电位（ERP）证据表明，编码焦点会改变记忆中绑定信息的质量，这可能会影响源记忆。在本研究中，参与者在使用蓝色或黄色滤光片研究产品图像时，要么专注于自我（自我聚焦），要么专注于滤光图像的颜色（其他聚焦）。自我聚焦编码产生了更积极的编码ERP、对新旧判断的更高识别率以及更大的晚期正成分（LPC；推测为回忆的神经关联）。其他聚焦编码导致更大的FN400成分，表明特征（即滤光片颜色和产品图像）被整合在一起，并增加了用于进行记忆判断的熟悉度。结果表明，编码焦点可以改变记忆中绑定特征的平衡。一些特征支持特定的记忆查询（诊断性回忆），而其他过去的特征不一定能为记忆查询提供信息（非诊断性回忆）。因此，回忆是一个复杂的过程，它取决于编码过程、所遇到信息的特征以及记忆探测的广泛背景之间的相互作用。
