Donald Trump's a fan: What is the Montreal Cognitive Assessment test?

The White House, in an attempt to dispel concerns about Donald Trump’s mental state, is highlighting the results of a test developed by a Canadian immigrant from Lebanon. 
The Montreal Cognitive Assessment, which identifies light impairment or the onset of Alzheimer’s disease, was designed by neurologist Ziad Nasreddine in the 1990s.
The test consists of a series of basic tasks like drawing a clock, counting down from 100 in increments of seven, naming words that start with a gi