That the phonebook was sorted alphabetically and that the array of numbers on the board behind the second row of paper itself was sorted alphabetically.
Each slide is dense with row after row of numbers, bullet points are strewn about generously on each page and complex graphs are squeezed in four to a slide.
But the singers all handled themselves well, although none were forced to sing more than one or two numbers in a row (so not a particular test of live ability).
Within the study, participants were asked to quickly scan a row of digits and cross out consecutive numbers that add to a pre-specified total (for example, any two numbers that total 3).
