With the onavg template, less data is required for analysis. "It's very expensive to obtain data through neuroimaging, and for some clinical populations—such as if you're studying a rare disease ...

John A. Ludwig ¹, Mark D. Stafford Smith ², Interpreting and Correcting Cross-scale Mismatches in Resilience Analysis, Ecology and Society, Vol. 10, No. 2 (Dec 2005) ...