Before revision: In the case where beliefs are ambiguous and represented by multiple priors, a decision maker (DM)'s updating behavior may also include a revision and refinement of her initial belief, a process which is absent from the Bayesian updating.
After revision: When ambiguous beliefs are represented by multiple priors, a decision maker (DM)'s updating behavior may also include a revision and refinement of her initial belief, a process which is absent from the Bayesian updating.