The data were collected using a MatLab program with the Psychtoolbox library. The program presented the task on screen and collected mouse-click responses. For the Random Generation task this involved presenting the clock-face display described in the original publication and collecting a series of mouse-click responses and response times. For the Wisconsin Card Sort Test this involved presenting the target cards and each successive card to be sorted on screen, and collecting the target pile selected for each card. Secondary tasks (three simple "executive" tasks - digit switching, two-back and go/no-go) were administered with E-Prime and the data collected, coded and collated manually.