What factors are considered in the assessment of credibility?

All parties referred me to the discussion of the well known factors to be considered in an assessment of credibility by Madam Justice Dillon in Bradshaw v. Stenner, 2010 BCSC 1398, at para. 186. These include: … the ability and opportunity to observe events, the firmness of his memory, the ability to resist the influence of interest to modify his recollection, whether the witness' evidence harmonizes with independent evidence that has been accepted, whether the witness changes his testimony during direct and cross-examination, whether the witness' testimony seems unreasonable, impossible, or unlikely, whether a witness has a motive to lie, and the demeanour of a witness generally...