Grit mediates social success across attention deficit/hyperactivity disorder tendencies

Attention-Deficit/Hyperactivity Disorder (ADHD) can erode social and occupational functioning. Grit-the perseverance and passion toward goals-has been linked to favorable life outcomes. We examined whether grit statistically accounted for the association between adult ADHD tendencies and monthly income.

We conducted an online survey of 2321 adults in Japan. ADHD tendencies were assessed with the Adult ADHD Self-Report Scale (ASRS; Inattention and Hyperactivity). Grit was measured with the 12-item Japanese Grit Scale (Perseverance of Effort, Consistency of Interest). Self-reported monthly income indexed economic success. Standardized multiple regression and indirect-effect models tested the associations; a parallel model evaluated the grit subcomponents simultaneously.

The total ADHD score was inversely related to grit (β = -0.049, p < .001) but not to income (β = -0.002, p = .868). Hyperactivity associated lower income (β = -0.015, p = .016), whereas Inattention did not (β = 0.001, p = .881). Indirect-effect analyses indicated a significant indirect association via grit (p < .001), whereas the residual direct association between ADHD tendencies and income was not significant (p = .847). In the parallel model, the pathway was driven by Perseverance of Effort (p < .001), while Consistency of Interest was not significant (p = .231).

Grit-specifically perseverance of effort-emerged as a key component of the ADHD-earnings association pattern, with a weak direct association. Because grit is cultivatable, interventions that strengthen sustained effort may mitigate economic disadvantage among adults with ADHD tendencies and represent a pragmatic target for functional improvement.