What is the test for credibility and demeanour of the witnesses?

Before turning to the first issue, I will discuss briefly the issue of credibility. Credibility involves an assessment of the trustworthiness of a witness' testimony based on the veracity, sincerity, and accuracy of the evidence he or she provides. The factors to be considered when assessing credibility were summarized by Dillon J. in Bradshaw v. Stenner, 2010 BCSC 1398 at para. 186, aff’d 2012 BCCA 296, leave to appeal ref’d [2012] S.C.C.A. No. 392. Of particular significance in this case is whether the parties' evidence harmonizes with other evidence that has been accepted; whether either of the parties changed or contradicted their testimony during direct and cross-examination; whether the parties' testimony seems unreasonable; and, of course, the demeanour of the parties generally.