Adding Small Differences Can Increase Similarity and Choice

@article{Kim2013AddingSD,
  title={Adding Small Differences Can Increase Similarity and Choice},
  author={Jongmin Kim and Nathan Novemsky and Ravi K. Dhar},
  journal={Psychological Science},
  year={2013},
  volume={24},
  pages={225 - 229}
}
Similarity plays a critical role in many judgments and choices. Traditional models of similarity posit that increasing the number of differences between objects cannot increase judged similarity between them. In contrast to these previous models, the present research shows that introducing a small difference in an attribute that previously was identical across objects can increase perceived similarity between those objects. We propose an explanation based on the idea that small differences draw… 
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