Fig. 4.

Active movement changes are accurately predicted by the RF model using both social and sensory information. (A, Upper) An example of |Δu_i(t)|, the magnitude of the measured change in velocity after subtracting the passive component (in the text) of a single fish in a group of three over 4 s; background colors mark acceleration epochs (pink) and deceleration epochs (white). BL, body length. (A, Lower) Comparison of the measured Δu_i(t) and the prediction obtained using the RF model (red arrows) in the acceleration epochs. (B) Prediction accuracy of Δu_i(t) by RF models that use only the social information component, only the sensory information component, or both components of Eq. 3 for different group sizes (error bars represent SEM; n = 6, 7, and 7 groups). (C) Improvement in predicting Δu_i(t) in acceleration epochs by the RF model relative to the corresponding zonal or topological versions (SI Materials and Methods has details); values are averaged over all groups of different sizes. CC, correlation coefficient; error bars represent SEM.