Each presented number activates the network with a noisy activation profile (middle panel: blue, red and green lines). When combining these activations together (right panel: blue line) a combined profile is activated in the network. Using simulations, we have shown that the center of mass of the combined network represents the sequence mean. We are currently working on a biologically plausible neural network that could extract the activation center of mass.
According to the model, evaluating more numbers results in higher activation (better signal-to-noise-ratio) yielding more precision.