5/11 We provide a Bayesian POMDP model that formalizes this idea, and show that our model captures key behavioural signatures of decisions about absence, assuming perfectly rational, unbiased behaviour.

6/11 To isolate the role of beliefs about visibility, we occluded parts of the display in a detection task. Our idea was the following: occlusion affects the visibility of present stimuli, but it can’t affect the visibility of absent stimuli.