DescriptionI describe a series of four experiments studying decision under uncertainty in the mouse and argue that their results demand a more sophisticated, information-‐processing, account of mouse behavior than current popular models. The tasks are based on the switch procedure of Balci, Freestone and Gallistel (2009), which employs interval-‐timing behavior to study decision under uncertainty. I show that: 1. Subjects respond to changes in task-‐relevant probabilities abruptly. 2. The number of trials before they detect a change in probability is predicted by the Kullback-‐Leibler divergence between the Bernoulli distributions of the two probabilities. 3. Subjects are capable of decreasing their timing variability. 4. Subjects differentiate between added exogenous temporal variability and their endogenous timing variability. I argue that these four results are best understood in an information-‐processing framework and modeling mouse behavior with algorithms that explicitly represent abstract quantities such as probability, exogenous variability and objective time.