Post-retrieval monitoring is associated with engagement of anterior cingulate and dorsolateral prefrontal cortex. Recent fMRI studies reported age-invariant monitoring effects in these regions and an age-invariant correlation between these effects and memory performance. The present study examined monitoring effects during associative recognition (difference in activity elicited by 'rearranged' and 'intact' test pairs) under single and dual (tone detection) task conditions in young and older adults (Ns = 28 per group). It was predicted that, for the older adults only, dual tasking would attenuate memory performance and monitoring effects and weaken their correlation. Consistent with this prediction, in the older group imposition of the secondary task led to lower memory performance and elimination of the relationship between monitoring effects and performance. However, the size of the effects did not differ between single and dual task conditions. The findings suggest that the decline in older adults' memory performance in the dual task condition resulted not from impaired monitoring, but from a different cause that also weakened the dependence of performance on monitoring.

中文翻译：

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老年人检索后监测的神经相关性在分散注意力下得以保留，但与记忆表现脱钩

检索后监测与前扣带回和背外侧前额叶皮层的接合有关。最近的 fMRI 研究报告了这些区域的年龄不变监测效应以及这些影响与记忆性能之间的年龄不变相关性。本研究检查了年轻人和老年人（每组 Ns = 28）在单一和双重（音调检测）任务条件下的联想识别（由“重新排列”和“完整”测试对引起的活动差异）期间的监测效果。据预测，仅对老年人而言，双重任务会减弱记忆表现和监测效果，并削弱它们的相关性。与这个预测一致，在较老的组中，强加次要任务导致较低的记忆性能和消除监控效果与性能之间的关系。然而，单任务和双任务条件之间的影响大小没有差异。研究结果表明，老年人在双重任务条件下的记忆力下降不是由于监测受损，而是由不同的原因造成的，这也削弱了表现对监测的依赖性。