MoCA Cube Copying (Three-Dimensional Copy) Flashcards
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Read the first 6 MoCA Cube Copying (Three-Dimensional Copy) flashcards as text
In the MoCA, what geometric figure is the examinee asked to copy in the three-dimensional copy task?
Answer: A three-dimensional cube
The examinee is asked to copy a pre-drawn three-dimensional cube. This task specifically assesses the ability to perceive and reproduce three-dimensional spatial relationships — a visuoconstructional skill distinct from the executive demands of clock drawing.
Which of the following criteria must be met to earn the 1 point on the MoCA cube copy task?
Answer: The drawing must be three-dimensional, all lines present, and no incorrect lines added
To score 1 point, the copy must be three-dimensional, all lines must be drawn (12 lines for a complete cube), and no extra lines may be added. Size matching, shading, and timing are not scoring criteria.
How many points is the cube copy task worth on the MoCA?
Answer: 1 point
The cube copy task is worth a maximum of 1 point. It is scored pass/fail based on whether the drawing meets the three-dimensional accuracy criteria.
What is the primary cognitive function assessed by the MoCA cube copy task?
Answer: Visuoconstructional ability
The cube copy task measures visuoconstructional ability — the capacity to perceive a three-dimensional spatial arrangement and accurately reproduce it through a motor drawing response. Deficits often reflect posterior cortical or parietal lobe pathology.
How does the cube copy task differ from the clock drawing task in what it primarily measures on the MoCA?
Answer: The cube copy tests pure 3D visuoconstructional ability while clock drawing additionally requires executive planning and number knowledge
The cube copy is a relatively pure measure of visuoconstructional ability. Clock drawing additionally requires executive planning (setting the hands to a specified time), conceptual knowledge (clock face layout, numerals), and abstract representation — making it a richer multidomain task.
If an examinee draws a two-dimensional square instead of a three-dimensional cube on the MoCA, how should this be scored?
Answer: 0 points, because the drawing is not three-dimensional
The drawing must be three-dimensional to earn the point. A two-dimensional square fails the three-dimensionality criterion and scores 0, regardless of how accurately the square itself is drawn.