I posted my first pre-print on bioRxiv: https://doi.org/10.1101/2020.03.06.979690. Here, we followed up on our previous paper in Current Biology, where we showed that human participants show confirmation bias in low-level perceptual decisions by selectively overweighting choice-consistent evidence. In the latest pre-print, we further showed that intermittent choices reduce the sensitivity of subsequent perceptual evidence, compared to a choice-independent motor response. This effect is accompanied by a transient increase in pupil size, possibly due to an internal state change triggered by choice commitment. Furthermore, it predicted the extent of confirmation bias, in both perceptual and numerical judgments. Intermittent choices also flipped the temporal weighting of decision evidence from recency to primacy suggesting that the temporal weighting profiles observed in evidence accumulation are neither fixed properties of certain tasks nor fixed traits of individual subjects. Looking forward to seeing this paper peer reviewed!
