Bottlenose dolphins are sensitive to human attentional features, including eye functionality.

However, we deem this prospect unlikely due to the subtle visual differences between ‘eyes open’ and ‘eyes closed’ conditions, and the reported lack of difference between the ‘eyes open’ and ‘half looking’ conditions, as well as the ‘eyes closed’ and ‘not looking’ conditions (although the later relationship was approaching significance ( p = 0.06 ) and would likely be significant in a more powered study).

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