The owner is clearly signalling: skip ahead to the end of the video,
where you can actually see her move her body and look at the correct key
before the dog responds. Since dogs can pick up on some truly amazing
cues from their owners (e.g., they can be trained to predict epileptic
seizures), I think a well-trained dog could accomplish this easily.
-- Dr. Samuel R. Mathias Neural Mechanisms of Human Communication Max Planck Institute for Human Cognitive and Brain Sciences Stephanstraße 1
04103 Leipzig, Germany Tel: +49 341 9940 2479