Jack Stevens, Joseph Rausch, Ngozi Osuagwu, Robyn Lutz
Efficacy of Behavioral Economic Nudges to Assist Teen Mothers: the Healthy Adolescent Transitions Randomized Controlled Trial
Prevention science : the official journal of the Society for Prevention Research
cognitive neuroscience long sought understand biological foundations human intelligence decades research revealed general intelligence correlated two brainbased biomarkers concentration brain biochemical nacetyl aspartate naa measured proton magnetic resonance spectroscopy mrs total brain volume measured using structural mr imaging mri however relative contribution biomarkers predicting performance core facets human intelligence remains well characterized present study sought elucidate role naa brain volume predicting fluid intelligence gf three canonical tests gf bomat number series letter sets three working memory tasks reading rotation symmetry span tasks administered large sample healthy adults n211 conducted exploratory factor analysis investigate factor structure underlying gf independent working memory observed two gf components verbalspatial quantitative reasoning one working memory component findings revealed dissociation two brain biomarkers gf controlling age sex naa concentration correlated verbalspatial reasoning whereas brain volume correlated quantitative reasoning working memory followup analysis revealed pattern findings observed males females analyzed separately results provide novel evidence distinct brain biomarkers associated specific facets human intelligence demonstrating naa brain volume independent predictors verbalspatial quantitative facets gf