2.4. Procedure
Participants were tested on two occasions exactly one week apart. On both occasions they carried out the six tasks, described below, used by Klein et al. (2006). Each session was held in the same location, at the same time of day, and was overseen by the same experimenter in order to maximise consistency between testing sessions. Task order was counterbalanced between participants using a Latin square design, but was kept constant across sessions for each participant.