Department of Psychology, University of California, Berkeley, Room 3210, Tolman Hall #1650, Berkeley, CA 94720-1650, USA.
Cogn Affect Behav Neurosci. 2012 Sep;12(3):599-609. doi: 10.3758/s13415-012-0096-8.
Activity in the posterior parietal cortex (PPC) has been shown to be a strong correlate of successful recognition performance. We assessed the degree to which the PPC mediates metacognitive judgments by assessing the feeling of knowing (FOK) for recently learned (episodic) and well-learned (semantic) facts (e.g., "The sport that is associated with Wimbledon is . . ."). Activity in ventral regions of the PPC was observed for strong FOKs for both sets of facts, although greater activity was observed for episodic than for semantic facts. Strong semantic FOKs activated anterior temporal regions. Weaker FOK ratings, when contrasted with strong FOKs, activated dorsal parietal regions, a finding that parallels contrasts during explicit tests in which low-confident responses were compared with high-confident responses. These findings demonstrate retrieval-related parietal activity during metacognitive judgments. Furthermore, they show that the ventral PPC is particularly engaged during context-specific, episodic retrieval, as compared to semantic retrieval.
后顶叶皮层（PPC）的活动已被证明与成功的识别性能密切相关。我们通过评估对最近学习的（情节的）和学得很好的（语义的）事实（例如，“与温布尔登相关的运动是...”）的感觉知道（FOK）的程度来评估 PPC 介导元认知判断的程度。在 PPC 的腹侧区域观察到了对这两组事实的强烈 FOK 的活动，尽管对于情节事实的活动比语义事实的活动更强。强烈的语义 FOK 激活了前颞叶区域。与强烈的 FOK 相比，较弱的 FOK 评分激活了背侧顶叶区域，这一发现与在明确测试中进行对比时的情况相似，在明确测试中，将低置信度的反应与高置信度的反应进行对比。这些发现表明在元认知判断过程中存在与检索相关的顶叶活动。此外，它们表明与语义检索相比，腹侧 PPC 在特定于上下文的情节检索中特别活跃。
