Narcolepsy and Gaming?

I came across a study which discusses the effects of narcolepsy on neurospsychological testing and driving simulation. The authors state:

There was no correlation between driving performance and neuropsychological test results or ESS Score. Neuropsychological test results did not significantly change in the follow-up. The difficulties encountered by the narcolepsy patient in remaining alert may account for sleep-related motor vehicle accidents. Driving simulator investigations are closely related to real
traffic situations than isolated neuropsychological tests. At the present time the driving simulator seems to be a useful instrument judging driving ability especially in cases with ambiguous neuropsychological results.

this made me wonder how sleep disorders effect gaming; if those with narcolepsy really don't have any measurable cognitive differences than controls, perhaps other factors (present in the driving simulator model) can account for negative effects of narcolepsy. If a gaming model is used, more data like reaction time and attention could be used to correlate with effects of narcolepsy.