Variable Details

Available Studies

MARS, Clinical Core


Not Scaled

Variable Type 


Variable Name 



Digital Pen Device

Percent ink time (Copy)
Total time pen is in contact with paper in copy condition

This variable is only available in MARS and in Clinical Core.

Percent ink time in the copy condition is captured during the digital Clock Drawing Test (dCDT) using digital pen technology. See the digital pen device category description for more information.

Participants are asked to use the digital pen to copy a model of a clock with hands set for “10 after 11.” This variable indicates the percentage of time the pen is in contact with the paper while producing the copy.