The claimant appealed the Tribunal’s decision that she did not suffer a catastrophic impairment and that she was not entitled to IRBs. She argued that the Tribunal erred in its causation analysis, in considering pre-existing conditions, and in attributing impairments to a subsequent event. The Court dismissed the appeal. The Court held that the Tribunal did not make any legal errors in its decision. The Tribunal correctly used the “but for” test in determining causation of the psychological injuries, and was correct in considering the claimant’s pre-accident and post-accident functioning in order to determine the cause of the psychological injuries. Finally, the Court held that the Tribunal’s consideration of a subsequent injury as an intervening event was not an error of law.