Visual synthesis of results using WQS, grouped WQS, and linear regression to quantify the associations between components, the six identified source factors, and neurocognitive outcomes in 9- to 10-year-old participants from the ABCD Study cohort () from 2016 to 2018. Created with Biorender.com. Numeric data for Figure 5 can be found in Excel Tables S7. Note: Br, bromine; Ca, calcium; Cu, copper; EC, elemental carbon; Fe, iron; K, potassium; , ammonium; Ni, nickel; , nitrate; OC, organic carbon; Pb, lead; PM, particulate matter; PMF, positive matrix factorization; Si, silicon; , sulfate; V, vanadium; WQS, weighted quantile sum; Zn, zinc. Due to unavailable source contribution data for one participant, regression models reflect .