DETERMINING A TRANSITION PROBABILITY FROM ONE OR MORE PAST ACTIVITY INDICATIONS TO ONE OR MORE SUBSEQUENT ACTIVITY INDICATIONS

Methods and apparatus related to determining a transition probability related to transition from one or more past activity indications to one or more subsequent activity indications. Some implementations of the specification are directed to methods and apparatus related to identifying a set of one or more activity indications of a user, identifying at least first and second transition probabilities from the set to a subsequent set of one or more activity indications, and determining a user transition probability from the set to the subsequent set based on the first and second transition probabilities.