Recipients of Stockton's unconditional basic income experienced clinically significant gains in mental health.

"When the control group was compared to themselves as a baseline, there was no significant change in scores on the Kessler 10. However, the treatment group showed significant improvement in scores when compared to themselves at baseline. Cohen’s d for this effect was .29, again a small effect. Taken together, these findings suggest that the treatment group experienced clinically and statistically significant improvements in their mental health that the control group did not - moving from likely having a mild mental health disorder to likely mental wellness over the year-long intervention."