The researchers collected salvia samples from participants before and after the stress-loading mental arithmetic tasks and also measured cortisol levels.
Since the end of the 20th century, the term human computer has also been applied to individuals with prodigious powers of mental arithmetic, also known as mental calculators.
One criticism, for example, is that two relevant test features which an air traffic controller must possess are missing: left-right coordination and mental arithmetic.
The volume of the grain was carefully measured, based upon the mean width, length and height, and calculated by mental arithmetic, pen and paper, or slide rule.
The presentation is immediately followed by the mental arithmetic component, during which the participant is asked to count backwards from 1,022 in steps of 13.