The present study examined the unique and interactive effects of behavioral inhibitory control and threat reactivity on suicide risk in youth. Results reveled that greater reactivity to unpredictable threat was associated with increased suicide risk at low, but not high, levels of inhibitory control. These findings shed light on subgroups of youth who may be at elevated risk.

Through the integration of psychophysiological and observational assessments, this study examined the implications of paternal postpartum depression (PPD) and infant respiratory sinus arrhythmia (RSA) for infants' empathy-related responses. Findings unveil the intricate interplay between environmental risk and physiological functioning and highlight RSA during infancy as a potent environmental sensitivity factor.

Our work suggests a neuromodulatory role of (tonic) norepinephrine in regulating (proactive) response inhibition, particularly via modulating the speed of the go response (and potentially the speed of the stop response). This further establishes norepinephrine as important to inhibition, but in a global way rather than stopping-specific, opposing earlier views.