more fixation-related BOLD response and less vigilance response in the cingulate. Potentially, this may indicate that adolescents with denser FH engage in less stimulus independent thought during easy task conditions (i.e., in response to a vigilance task), but more such thought when task demands cease (i.e., during fixation). A task with varied rest durations and task demands could help ascertain if this activation pattern is beneficial to performance by maintaining cognitive arousal (Mason et al., 2007), or counter-productive, by allocating resources away from the target task.
