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Fig. 4. Interleaved timing of 60 automatically administered trials during one
experimental night with three animals sequentially exchanged between the
64-feeder array (trial) and their individual cages (inter-trial). Shading
indicates trial at the feeder array (black), enclosure phase (horizontal
stripes), animal in cage before and after a series of experimental trials
(dark grey). Feeders at array are active (black circles) or inactive (open
circles) but indistinguishable in external appearance (not cued) for the test
animal.