Fig. 6.

CWM data in rats tested under standard or infrared light (Mean ± SEM errors). One group of adult male Sprague-Dawley rats were tested in the dark (infrared) first then switched to standard light (dark-light group) while the other group was tested in the light first then switched to the dark (infrared; light-dark group). As can be seen, the dark-light group was slow to learn but adapted rapidly once the lights were turned on. The light-dark group learned rapidly under standard light, but were initially disrupted when switched to the dark, but rapidly improved again to asymptotic performance. From (Vorhees and Williams, 2014b).