Is The Uncanny Valley An Uncanny Cliff?. Bartneck, C., Kanda, T., Ishiguro, H., & Hagita, N. In Proceedings of the IEEE International Symposium on Robot and Human interactive Communication, pages 368--373, 2007.
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The uncanny valley theory proposed by Mori in 1970 has been a hot topic in human robot interaction research, in particular since the development of increasingly human-like androids and computer graphics. In this paper we describe an empirical study that attempts to plot Mori's hypothesized curve. In addition, the influence of framing on the users' perception of the stimuli was investigated. Framing had no significant influence on the measurements. The pictures of robots and humans were rated independently of whether the participants knew a particular picture showed a robot or human. Anthropomorphism had a significant influence on the measurements, but not even pictures of real humans were rated as likeable as the pictures of humanoids or toy robots. As a result we suggest the existence of an uncanny cliff model as an alternative to the uncanny valley model. However, this study focused on the perception of pictures of robots and the results, including the suggested model, may be different for the perception of movies of moving robots or the perception of standing right in front of a moving robot.
@InProceedings{Bartneck2007,
  Title                    = {Is The Uncanny Valley An Uncanny Cliff?},
  Author                   = {Bartneck, C. and Kanda, T. and Ishiguro, H. and Hagita, N.},
  Booktitle                = {Proceedings of the IEEE International Symposium on Robot and Human interactive Communication},
  Year                     = {2007},
  Pages                    = {368--373},

  Abstract                 = {The uncanny valley theory proposed by Mori in 1970 has been a hot topic in human robot interaction research, in particular since the development of increasingly human-like androids and computer graphics. In this paper we describe an empirical study that attempts to plot Mori's hypothesized curve. In addition, the influence of framing on the users' perception of the stimuli was investigated. Framing had no significant influence on the measurements. The pictures of robots and humans were rated independently of whether the participants knew a particular picture showed a robot or human. Anthropomorphism had a significant influence on the measurements, but not even pictures of real humans were rated as likeable as the pictures of humanoids or toy robots. As a result we suggest the existence of an uncanny cliff model as an alternative to the uncanny valley model. However, this study focused on the perception of pictures of robots and the results, including the suggested model, may be different for the perception of movies of moving robots or the perception of standing right in front of a moving robot.},
  Doi                      = {10.1109/ROMAN.2007.4415111},
  Keywords                 = {anthropomorphism;computer graphics;human robot interaction research;human-like android;toy robots;uncanny valley theory;humanoid robots;man-machine systems;human-robot interaction},
  Review                   = {- Uncanny valley may exist because we look at robots and expect machine-like characteristics, but is weirded out by human-like characteristics -> seems unnatural
- Perhaps uncanny valley only lasts for a short while, when a person first encounters such things, and disappears after a while
- The word used in the original graph better translates to "affection level", not "familiarity", as it is commonly translated into

- Assessed existing tests with Cronbach's alpha (a stats test)
- Showed users a bunch of pictures of humans, robots, CG
 - presented only female pictures because only female androids existed at time of study
 - asked to rank likibility and such 
- the robot was framed as a robot, human or not specified
- sample size: 58, all Japanese university affeliates

- did ANOVA
 - framing had no impact
 - anthropometrism (how humanlike) did
- people like robots toys and humanoids more than people -_-
 - uncanny "cliff" -> might not really want super humanlike robots, since slightly machine like is liked
 - might not like humanlike things really all that much after all

Confounding variables
- Japanese ppl like robots more
- Maybe distracted by beauty bias -> robots made to look pretty
- All pictures were static...},
  Timestamp                = {2011.02.09}
}

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