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. Author manuscript; available in PMC: 2011 Jan 1.
Published in final edited form as: J Vis. 2009 Apr 27;10(4):15.1–1512. doi: 10.1167/10.4.15

Figure 4.

Figure 4

Experiment 2 results (N=43). (a) Mean d′ values for the same-different matching of identical and complementary faces and cars in their upright and inverted orientations. Error bars represent the standard error of the mean. (b) Correlation plot showing the relationship between the Complementation Effect (accuracy on Complementary trials subtracted from accuracy on Identical trials) in the upright car condition and the Car Expertise Index (Car d′ – Bird d′). Grey squares represent the subset of the population with Bird d′ scores greater than 1 (n=10 out of 43). The linear regression calculated for the remaining participants (n=33) shows a significant positive correlation (r=.35, p<.05).