The Uncanny Valley Hypothesis (UVH) describes the sudden change in a person's affect from affinity to aversion that is evoked by robots that border a human-like appearance. The portion of the human-likeness spectrum in which such aversion is posited to occur is referred to as the “uncanny valley”. However, evidence in support of the UVH is primarily based on subjectively assessed evaluations. Thus it remains an open question as to whether there are behavioral or neurophysiological manifestations of uncanny valley effects.
@inproceedings{straitscheutz14roman,
title={Measuring Users' Responses to Humans, Robots, and Human-like Robots with Functional Near Infrared Spectroscopy},
author={Megan Strait and Matthias Scheutz},
year={2014},
booktitle={Proceedings of 23rd IEEE Symposium on Robot and Human Interactive Communication (RO-MAN)},
url={https://hrilab.tufts.edu/publications/straitscheutz14roman.pdf}
}