A more precise association of THC levels and degrees of impairment are not yet available.
In general, the disabled folks are vulnerable to exploitation, in part because of the nature of their impairment.
As a group, no overall statistically significant improvement or impairment was seen as a result of taking Adderall.
impairment im·pair·ment (ĭm-pâr'mənt)
Weakening, damage, or deterioration, especially as a result of injury or disease.