Simulation of the three stage experiment with the HKB model (Eq. 1): Time series for the two
oscillators (x1,2), measured frequencies
(ω1,2), eigenfrequencies
(Ω1,2), and relative phase
(φ) (top to bottom). When the coupling is turned on
(20–40 sec), the oscillators synchronize at a common frequency and
relative phase stabilizes close to 0 rad. When the coupling is turned off
(40–60 sec), each partner’s frequency returns to its original
value, showing no social memory. Model parameters: α =
β = 1, γ = 2,
A = −2.00, B = 0.50.