LAUSR

Highlights • This is the first study to investigate the development of response inhibition focussing on variability.• We examined intraindividual variability both in stopping latencies and the underlying neural circuitry.• There were no developmental differences in mean response inhibition, yet clear differences in performance variability.• This, in turn, was associated with developmental differences in brain signal variability.• Behavioral and neural variability indices might be a more sensitive measure of developmental differences in inhibition.