Discriminator strategies base aid on recipients’ most recent recorded move.

Evidence

Consider two image scores, 0 for someone who defected last round and 1 for someone who cooperated last round. Thus the image score depends only on the last move of a player as a donor. Consider two types of players: discriminators, who help only players with image score 1, and defectors, who never help. — Nowak, M. A., & Sigmund, K, Evolution of Indirect Reciprocity by…, 109

Categorization

• XREF: Directly parallels the reader’s analytic frame citing Nowak & Sigmund image scoring vs. Hester Prynne’s scarlet letter as a fixed image score. — connects to: Donor-specific image scoring sustains cooperation while self-only strategies fail — Nowak, M. A., & Sigmund, K, Evolution of Indirect Reciprocity by…, 73; Behavior can track type even when encounter partners are anonymous; Prior biased policing leaks into race-neutral variables like conviction history — Brian Christian, The Alignment Problem, 296

Related

• Unconditional cooperators must be modeled separately from image-scoring discriminators. (similarity 0.81)
• An image score updates only when one acts as donor, not as recipient. (similarity 0.79)
• A two-level analytical image-scoring model can be solved rather than simulated (similarity 0.79)

Broader Connections

• Donor-specific image scoring sustains cooperation while self-only strategies fail #expands (0.80) — Nowak, M. A., & Sigmund, K, Evolution of Indirect Reciprocity by…, 73
• Behavior can track type even when encounter partners are anonymous #corroborates (0.78)
• Prior biased policing leaks into race-neutral variables like conviction history #contradicts (0.75) — Brian Christian, The Alignment Problem, 296