In a trial for child sexual abuse, both the Crown and the defence brought applications to introduce expert testimony.
The Crown sought to introduce evidence from a clinical psychologist regarding delayed disclosure and the relationship between sexual abuse and non-epileptic seizures.
The defence sought to introduce evidence from a cognitive psychologist on similar topics, as well as the effect of questioning techniques on children.
The court applied the Mohan test and ruled that both experts could testify on delayed disclosure and non-epileptic seizures, as this information was outside the normal experience of the trier of fact.
However, the court excluded the defence expert's proposed testimony on questioning techniques, finding it unnecessary as assessing credibility is within the court's expertise.