President Donald Trump received a perfect score on the world's standard cognitive assessment test, his doctor revealed in a White House briefing today.

The 10-minute test, known as the Montreal Cognitive Assessment (or, MoCA), was created in 1996 for medical professionals to determine mild cognitive dysfunction.

It assesses concentration, attention, memory, language, calculations, orientation, executive functions and visual skills.

Trump scored 30 out of 30. A score above 26 is deemed 'normal', while anything lower than that is caused for concern.

Those who do well on the test do not need to perform any other tests.

The average score is 27.4. People with mild cognitive impairment score an average of 22.1, while Alzheimer's patients tend to score around 16.

First used in Montreal, Canada, the test is now one of the most respected methods of assessing cognitive health worldwide, available in 55 languages and dialects, and formats for testing illiterate patients and in other cultural settings (by changing certain references).

President Trump is the first president to ever undergo the test as part of his presidential physical.

Here are some examples of the test doctors use, and how the patient is graded:

ALTERNATING TRAIL MAKING

TEST: The patient is told to pair up five numbers and letters (1-5, A-E) in ascending order (pairing 1 with A, 2 with B, etc).

RESULT: The patient gets a point for every successful pair: 1-A; 2-B; 3-C; 4-D; 5-E. No lines can be crossed. The patient earns 0 if they make a mistake that is not immediately corrected.

NAMING

TEST: Name each animal.

RESULT: One point for each

Lion

Rhinoceros (or rhino)

Camel (or dromedary)

MEMORY

TEST:

Step one: The doctor tells the patient that they are going to read a list of words that the patient must remember. At the end the patient has to tell them as many as they remember, it doesn't matter what order.

The doctor then reads five words, one per second:

FACE, VELVET, CHURCH, DAISY, RED

As the patient recites the words, the doctor marks a check in the box for each word said aloud.

The patient indicates when they have recalled all they can.

Step two: The doctor reads list a second time. At the end the patient has to recall all 10 words.

The doctor then reads words again, one per second.

As the patient recites the words, the doctor marks a check in the box for each word said aloud - including the first five again.

The patient indicates when they have recalled all they can.

SCORING: No plus points, only minus if they get it wrong.

SENTENCE REPETITION

TEST:

Step one: The examiner reads this sentence, and the patient has to repeat it exactly: 'I only know that John is the one to help today'.

Step two: The examiner then reads another sentence, with the same instruction: 'The cat always hid under the couch when dogs were in the room'.

SCORING: One point for each correct sentence.

DELAYED RECALL



TEST: The patient has to recall all the words they heard earlier (FACE, VELVET, CHURCH, DAISY, RED).

SCORING: One point for each word recalled (with no cues from the examiner).

TOTAL SCORE:

Add up all the points accumulating, adding a point if the patient has fewer than 12 years of formal educations.