Table 2. Healthy brain network project plan.

Project Plan Goals
Phase I: Implementation and Testing (N=500)
• Establish project workflows • Mental health diagnostic evaluation • Phenotypic assessment • EEG • MRI scanning• Establish prototypes for Diagnostic Research Center (HBN-Staten Island)	• Test utility of mobile Diagnostic Research Center• Test utility of mobile MRI platform• Establish recruitment sources and community partners
Phase II: Revision and Hardening (N=500)
• Augment learning and language evaluation protocols• Increase breadth of phenotyping and overlap with other initiatives • Family history • Impairment • Prenatal assessment • Parental distress • Sleep • Stress/trauma • Substance use• Identify and troubleshoot data quality issues	• Introduce voice assessment protocols• Introduce saliva collection for genetics• Introduce natural viewing fMRI• Introduce home-based longitudinal follow-up (HBN Quarterly Mental Health Report)• Optimize staffing models and workflow efficiencies• Test and harden KSADS-COMP• Test and harden E-SWAN• Test reproducibility of prototype Diagnostic Research Center (HBN-Manhattan)
Phase III: Scale-up (N=7,500)
• Increase to three full-scale Diagnostic Research Centers• Transition to multi-site stationary MRI scanner model	• Implement infrastructure for epidemiologic sampling• Introduce home-based phlebotomy collection model• Introduce actigraphy
Phase IV: Targeted Recruitment (N=1,500)
• Epidemiologic sampling