Table 2.

Inclusion and exclusion criteria for the second in-person interview

	Inclusion Criteria
SDMT	1.282 SD or more below published normative data (10th percentile).
	Exclusion criteria
Visual Acuity	Corrected near vision worse than 20/70 (to see the test materials). Severe nystagmus according to neurologist ratings.
The Beck Depression Inventory	Score ≥ 29 (indicative of severe depression)
Token test	Score ≥ 29 indicative of intact verbal comprehension
MRI sites only	Failing the standard MRI screening form

MRI Magnetic Resonance Imaging, SDMT Symbol Digit Modalities Test