Different patterns of intrinsic functional connectivity at the default mode and attentional networks predict crystalized and fluid abilities in childhood

Abstract Crystallized abilities are skills used to solve problems based on experience, while fluid linked reasoning without prior knowledge. To what extent crystallized and involve dissociated or overlapping neural systems is debatable. Due often deployed small sample sizes different study settings in work, the basis of childhood remains largely unknown. Here we analyzed within between network connectivity patterns from resting-state functional MRI 2707 children 9 10 years ABCD study. We hypothesized that differences at default mode (DMN), ventral, dorsal attentional networks (VAN, DAN) explain abilities. found stronger between-network DMN VAN, DAN, VAN DAN predicted Within-network both Our findings reveal rely coupling DMN, whereas associated with a focal configuration DAN. provides new evidence into child intelligence calls for future comparative research adulthood during neuropsychiatric diseases.