Figure A1.

Mean proportion of time (perseverance) allocated by different groups of drivers to different circuits in the self-paced training. Error bars indicate the standard error of the mean. Comments: Younger drivers from the 2012 study [19] spent more of their training time in Circuits 3 and 4 than in Circuits 1 and 2, all p < 0.006. No difference was observed either between times spent in Circuits 3 and 4 (p = 0.99) or between times spent in Circuits 1 and 2 (p = 0.88). A focus on slightly easier items was observed in the younger-older control drivers, as they spent less of their time in Circuit 4 than younger drivers did (p < 0.01) and also more of their training time in Circuit 3 than in Circuit 4 (p = 0.01) and marginally more of their training time in Circuit 3 than in Circuit 1 (p = 0.09). Finally, the older-older control drivers focused their training time mainly on Circuits 1 and 2 and reliably less on Circuits 3 and 4, all p < 0.003, while there was no difference between times spent in Circuits 1 and 2 (p = 0.75) and in Circuits 3 and 4 (p = 0.63). This self-regulatory pattern was totally inverted in comparison with the one exhibited by younger drivers from the 2012 study (all p < 0.03), and the older-older drivers also spent more time in Circuit 1 and less time in Circuit 3 than the younger-older control drivers did (both p = 0.02).