Relationships between human resources burdens in proof‐of‐concept psychosocial “seed” grantees and child outcome size (signal strength) scores, where data were available. Saving Brains projects with child development signal‐strength scores of 1 or 2 (SB Projects with Low Scores) were compared with those with scores of 3 or 4 (SB Projects with High Scores), as well as external, published studies we coded (External, Published Projects). (A) Hours of training for an individual staff member per family served are shown, n = 24. Training includes initial baseline training, refresher training, and supervisory time. There was an insufficient n for published literature (n = 3). (B) Hours spent by staff delivering interventions, n = 38. Two outliers were removed. (C) Hours spent by families receiving interventions, either in groups or individually, n = 38.