Which curve indicates the GREATEST sensitivity (best signal detection)?
- A
The red curve closest to the diagonal
- Bcheck_circle
The green curve farthest from the diagonal (d' = 2)
- C
All curves indicate equal sensitivity
- D
The diagonal itself
Explanation
In ROC analysis, curves that bow farther toward the upper-left (away from the chance diagonal) reflect higher sensitivity (d'). The green curve here represents the best discrimination.