«They involve relatively complex processes and rather constrained sets of uncertain parameters.» (newscientist.com)
The final three rows list some studies using non-uniform prior distributions, while the other studies use uniform prior distributions of ECS, except for Gregory et al. (2002a) who implicitly use a uniform prior on transient climate response (see Frame et al., 2005), and Annan et al. (2005) who select a range based on sampling uncertain parameters in their model. (ipcc.ch)
Eight test cases were constructed and an ensemble of USHCN analyses were undertaken, varying uncertain parameters within the algorithm. (dotearth.blogs.nytimes.com)