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Description: Previous studies found that in a multisensory scenario, people make decisions by weighing the objective reliability of signals from each modality. However, plenty of evidence has shown suboptimality in multisensory cue combination, suggesting imperfection in uncertainty estimation. Another explicit way of uncertainty estimation, confidence rating, has been shown noisy and can be dissociated with the accuracy of judgment of the sensory stimuli. It is unknown whether multisensory cue combination and confidence ratings share the same source of inefficiency and whether they have the same computational rules. We investigated this question by examining whether stimuli that induce confidence-accuracy dissociations have similar effects on multisensory cue combination. https://www.biorxiv.org/content/10.1101/2023.06.07.544029v1 for our preprint.