Cooperation arises from partner choice, not reciprocal tit-for-tat, across species and human development.

Evidence

In fact, evidence from both human children and other species suggests that partner choice is a fundamental mechanism shaping cooperation both across ontogeny and in other species. In nonhuman primates, observational and experimental studies provide abundant evidence that individuals engage in long-term reciprocal relationships that result from seeking out other cooperators (Schino & Aureli 2010). For example, chimpanzees selectively choose skillful over unskillful cooperators for a mutualistic task (Melis et al. 2006) and choose a partner who had chosen them previously over one who ignored them (Melis et al. 2008). In contrast, evidence for reciprocal exchanges in which individuals temporally modulate their cooperation within a dyad contingent upon the partner’s prior behavior (such as tit-for-tat) is weak to nonexistent (Hammerstein 2003). In human infants, a similar pattern has emerged. In the first few years of life, children begin to differentiate between cooperators and defectors (Kuhlmeier et al. 2003), show a preference for cooperators over defectors (Hamlin et al. 2007), and tend to cooperate with cooperators over defectors (Dunfield & Kuhlmeier 2010). However, temporally contingent reciprocity in a dyadic relationship seems to emerge much later: Children do not begin to selectively decrease or increase their giving in response to what they received from a partner until 3.5 years of age (Warneken & Tomasello 2009a). — Nicolas Baumard, A mutualistic approach to morality, 593

Categorization

• XREF: Bolsters the Baumard et al. partner-choice framework the reader is building with; connects to the analytical integration of fumi-e as partner-choice destruction. — connects to: Kin selection explains cooperation only among genetically related relatives; Altruistic cooperators still choose partners they trust and cooperate only where reciprocation is possible. — Nicolas Baumard, A mutualistic approach to morality: The…, 410; Cooperation outcomes depend on partner choice frequency, not rule fairness. — Nicolas Baumard, A mutualistic approach to morality: The…, 257 (+11 more)
• SHARE: A developmental psychologist would love this — tit-for-tat is weakly supported, partner choice is primary, and contingent reciprocity only appears at 3.5 years.

Related

• Partner choice predicts fair cooperation while group selection predicts utilitarian cooperation. (similarity 0.85)
• Partner choice theory shifts cooperation research away from dyadic Prisoner’s Dilemma models. (similarity 0.84)
• Altruistic cooperators still choose partners they trust and cooperate only where reciprocation is possible. (similarity 0.83)
• Natural variation among partners drives selection toward greater cooperation. (similarity 0.83)
• Generalized reciprocity cannot be explained by partner-control mechanisms. (similarity 0.82)
• Kin selection explains cooperation only among genetically related relatives (similarity 0.82)
• Fairness evolves from partner choice, not partner control (similarity 0.82)
• Morality evolved because fair partners were preferred in cooperative interactions (similarity 0.82)
• Natural selection favors both the disposition to reciprocate and to volunteer help proactively. (similarity 0.81)
• Cooperation outcomes depend on partner choice frequency, not rule fairness. (similarity 0.81)
• Morality evolves from individual partner-choice competition, not group selection. (similarity 0.81)
• Morality may have evolved via partner choice over partner control (similarity 0.80)
• Competition for partners drives costly reputation-building cooperation. (similarity 0.80)
• Moral norms differ by relationship type, not by one universal strategy. (similarity 0.80)
• Cooperation and morality are distinct categories. (similarity 0.80)

Broader Connections

• Cooperation outcomes depend on partner choice frequency, not rule fairness. #expands (0.82) — Nicolas Baumard, A mutualistic approach to morality, 257
• Partner choice predicts fair cooperation while group selection predicts utilitarian cooperation. #expands (0.82) — Nicolas Baumard, A mutualistic approach to morality, 637
• Natural variation among partners drives selection toward greater cooperation. #expands (0.80) — Nicolas Baumard, A mutualistic approach to morality, 619
• Partner choice theory shifts cooperation research away from dyadic Prisoner’s Dilemma models. #expands (0.80) — Nicolas Baumard, A mutualistic approach to morality, 254
• Morality evolves from individual partner-choice competition, not group selection. #corroborates (0.78) — Nicolas Baumard, A mutualistic approach to morality, 605
• Cooperation has no single solution; motivations combine and overdetermine action #qualifies (0.78)
• Kinship and reciprocity alone cannot explain large-scale human cooperation #corroborates (0.78) — Norenzayan, Ara, Big gods - how religion transformed…, 648
• Partner-choice cooperation theory does not explain the intrinsic moral sense. #responds-to (0.75) — Nicolas Baumard, A mutualistic approach to morality, 56
• Cooperation can be sustained by partner exclusion rather than by punitive coercion. #expands (0.75) — Nicolas Baumard, A mutualistic approach to morality, 173
• Fairness is not reducible to mutualistic partner choice. #qualifies (0.72) — Nicolas Baumard, A mutualistic approach to morality, 567
• Cooperation might evolve spontaneously without anyone manipulating it #complicates (0.72)