Sequence representation as an early step in the evolution of language
Fig 2
Performance of Depth-ℓ representations of stimulus sequences in environments of different sizes.
The x-axis represents the time-steps or learning opportunities and the y-axis represents the performance measured after a given number of time-steps, as described in the methods section. a: Learning in an environment consisting of 20 different stimuli. b: Learning in an environment consisting of 500 different stimuli. In both environments, the rate of increase of information with respect to the increase of ℓ is 0.5 (approximating the parameter setting r = 0.5 in the analytical model). However, the information increase ceases when ℓ > 4, as we are only including Depth-1 − 4 representations in the simulations. The learning rate in the simulations approximates τ = 10 in the analytical model.