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. 2016 Jul;123(4):368–391. doi: 10.1037/a0039996

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© 2016 The Author(s)

This article has been published under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Copyright for this article is retained by the author(s). Author(s) grant(s) the American Psychological Association the exclusive right to publish the article and identify itself as the original publisher.

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Option positions (R, F, RF, and Rprime) used by Wedell (1991). The dotted line represents the line of equal expected value on which two of the three options sit (green circles). The third option is the decoy (red triangle) and it is in one of two positions in each condition. Its position varies according to condition but it is always dominated by one of the other two options on at least one feature dimension (probability or value). See the online article for the color version of this figure.