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Evolvability Is Inevitable: Increasing Evolvability without the Pressure to Adapt

Figure 4

Evolvability of evolved robots with the passive drift model.

The evolvability of evolved robots subject to passive drift is shown averaged (in different ways) over 50 independent runs that lasted 250 generations each. If evolvability is averaged within each niche and then over all niches, it appears to increase. If instead evolvability is averaged over all organisms, there is no significant increase.

Figure 4