ESM Video 2: Training 1-3 from Sheep recognize familiar and unfamiliar human faces from two-dimensional images KnolleFranziska GoncalvesRita P. Jennifer MortonA. 2017 This video was made for demonstration purposes and was not part of the original training. The video shows examples of the sheep's choice of the correct stimuli during each training stage. Example stimuli are identical to those used during the training.