Figure 2.

Approximate posteriors: The full approximate posterior distribution is q(W, A, λ, α, β) = [∏${}_{\mathit{\text{n}}\text{=1}}^{\mathit{\text{N}}}$ q(w_n)q(a_n)q(λ_n)] q(α)q(β). The boxes in the figure show each component of the approximate posterior along with update equations for their sufficient statistics.