In the first subtest, “Comparing surfaces”, the respondent is shown two abstract figures that are displayed for 30 seconds. For each pair the respondent must decide which of the two is the larger. As soon as an answer has been entered the next pair appears.
In the second subtest, “Coding symbols”, the respondent’s task is to correctly assign as many symbols as possible. Between the five runs (each lasting 50 seconds) respondents are asked to predict their future performance. From the third run onwards a frustration condition is also introduced.
The third subtext, “Differentiating between figures”, has no explicit time limit. The respondent’s task is to work as quickly as possible and to identify the shape in each row of symbols that does not fit before moving on to the next row. Respondents receive immediate feedback on whether their answer was correct.