Video 1. Animal performing sequences of lever-presses, doing magazine checks and obtaining reinforcement during the last training session.

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DOI: 10.7554/eLife.09423.005

A 20 mg food pellet was delivered in the magazine when the animal performed three consecutive presses within 660 ms (covert target = 4.5 Hz).

DOI: http://dx.doi.org/10.7554/eLife.09423.005