La pratique répétée du Trail Making Test réduit les différences liées à l’âge sur la performance à ce test

Age-related impairment in executive functioning has been found to explain partially the decrease of cognitive performance with aging. However, the practice of an executive test can improve performance to this test. In the present study, we investigated first how the practice of the Trail Making Test (TMT, flexibility test) may influence the age-related deficit to the performance in this test and then how the performance tended to improve, and at which pace, through the practice of this executive test. Two age groups of participants (young and older adults) practiced the TMT and were compared to two control groups (i.e., no practice between pre- and post-test). The practice groups’ scores were obtained at the end of each session. Globally, the results showed an improvement of performance (1) greater in the practice groups than in the control groups and (2) in practice groups, greater in older adults than in younger ones. Both younger and older adults progressed during the early practice sessions but the younger ones reached their optimal level earlier than the older adults who continued to improve over the sessions. These results could have a major impact on adapting cognitive stimulation programs to individual's characteristics such as age.