RT Journal Article SR Electronic T1 Temporal-sensitive prefrontal involvement in associating confidence with task performance illustrates metacognitive introspection in Old World monkeys (Macaca mulatta) JF bioRxiv FD Cold Spring Harbor Laboratory SP 2021.11.30.470665 DO 10.1101/2021.11.30.470665 A1 Cai, Yudian A1 Jin, Zhiyong A1 Zhai, Chenxi A1 Wang, Huimin A1 Wang, Jijun A1 Tang, Yingying A1 Kwok, Sze Chai YR 2021 UL http://biorxiv.org/content/early/2021/12/02/2021.11.30.470665.abstract AB Metacognition refers to the ability to be aware of one’s own cognition. Ample evidence indicate that metacognition in the human primate is highly dissociable from cognition, specialized across domains, and subserved by distinct neural substrates. However, these aspects remain relatively understudied in the macaque monkeys. Here we investigated the functionality of macaques’ metacognition by combining a confidence proxy, hierarchical Bayesian meta-d’ computational modelling, and single-pulse transcranial magnetic stimulation technique. We found a critical role of Brodmann Area 46d (BA 46d) in supporting metacognition without implicating task performance and its critical time-sensitive role in meta-calculation. We additionally revealed that macaque metacognition is highly domain-specific with respect to memory and perception decisions. These findings carry implications for our understanding of metacognitive introspection within the primate lineage.Competing Interest StatementThe authors have declared no competing interest.