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Table 1. 

The Numbers of Female and Male Face Images for Each of the Predetermined Levels of Trustworthiness in the Set of 160 Stimuli Used in the Present Study


Trustworthiness Level
−8
−7
−6
−5
−4
−3
+1
+2
+3
+4
+5
+6
+7
+8
Female 15 10 
Male 14 12 

Trustworthiness Level
−8
−7
−6
−5
−4
−3
+1
+2
+3
+4
+5
+6
+7
+8
Female 15 10 
Male 14 12 

The levels of rated trustworthiness were determined by Oosterhof and Todorov (2008), and in their original, larger stimulus set, ranged in equal steps from −8 (highly untrustworthy) to +8 (highly trustworthy). For the present study, a pilot experiment was conducted to select faces from this larger set (see Methods). We avoided selecting faces from the middle of the scale in order to lessen the difficulty of making the required two-alternative forced-response (trustworthy/untrustworthy) judgment.

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