Figure 2.

Simulation of resolution of early delay. Group averaged developmental trajectories for 1000 simulated children in a model of English past tense formation, assuming a polygenic model for language delay (Thomas & Knowland, 2014). Delay was defined at Time 1 as networks whose performance fell more than 1 standard deviation below the population mean. Networks were defined as having resolving delay if their performance fell within this normal range by Time 5; and as having persisting delay if their performance remained below the normal range by Time 5 (see Thomas & Knowland, 2014, for further details). Error bars show standard deviations.