FIG. 1.
Schematic of the training apparatus, shown from above. Ferrets made behavioral responses and received water rewards from the three stainless steel water spouts while standing on the aluminium footplate. In the first training stage, sounds were presented from the central loudspeaker (black) as well as the two peripheral loudspeakers (gray). In later training stages and during testing, sounds were presented from the central loudspeaker only.