With the proviso that n-back performance often improves over (at least) the first few weeks of daily training. So if Mark_Gomer & his friend start n-backing at about the same time they change sleep schedule, they might get a spurious improvement in n-back scores.
With the proviso that n-back performance often improves over (at least) the first few weeks of daily training. So if Mark_Gomer & his friend start n-backing at about the same time they change sleep schedule, they might get a spurious improvement in n-back scores.