corvid
IB-corvid-spread-linear
Crow scolding of a known dangerous-human mask DOUBLED and spread at least 1.2 km over 5 years, with LINEAR (non-saturating) growth — a saturating/plateau model was statistically rejected.
Observed quantities
>=1.2 km spread over 5 yr; scolding roughly doubled; linear fit Y = 22.3 + 1.0X, p = 0.0005; plateau model rejected
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Primary source
- Cornell, Marzluff & Pecoraro 2012, Proc. R. Soc. B
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Boundary of this block
'A distributed representation held aloft across the network' is a researcher OVERLAY on transmission statistics; NO coupling parameter was measured.
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Connections
Outgoing
- relates to In crows, mobbing is a self-reinforcing recruitment LOOP: 82% of scolding events recruited a mob, averaging 6.4 birds (n=103). recruitment is the local loop that drives the linear spread
- relates to SOCIAL transmission (imitating others) homogenizes cultural material toward a shared attractor while SOLO transmission does not: in a sung-melody transmission experiment, social chains converged and solo chains did not. cross-domain: population-level social transmission dynamics
Incoming
- relates from A single ~5-minute trapping event teaches wild American crows a specific threatening human face: mask-specific scolding persists at least 2.7 years and SPREADS, rising from ~26% to ~66% of crows, while a neutral-mask control stays flat. the same acquired memory then propagates through the population
- relates from SOCIAL transmission (imitating others) homogenizes cultural material toward a shared attractor while SOLO transmission does not: in a sung-melody transmission experiment, social chains converged and solo chains did not. cross-domain: population-level social transmission dynamics