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What connects difficulties in social cognition, self-awareness, and abstract reasoning in those with Corpus Callosum Dysgenesis (CCD)? Here, across three experiments, we find that the corpus callosum is integral to metacognitive efficiency - www.biorxiv.org/content/10.6...

We conducted three experiments (Online, Lab, and VR) using Random Dot Kinematogram (RDK) tasks to test perceptual accuracy and confidence in individuals with CCD. tl;dr: Those with CCD showed normal perceptual accuracy, but poor metacognitive sensitivity.

We suggest that the absence of a CC is causing a nonsystematic computational failure. This would explain why those with CCD struggle to notice social and reasoning errors in classic neuropsych tests, and suggests a crucial role of the CC in metacognition code/data: github.com/Brain-Develo...