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This questionnaire is designed to analyze the concept of facial similarity between individuals according to human perception.
Please read the Participant Information Sheet before taking part in the questionnaire
Example Question:
Please study the reference image that appears on the bottom leftmost area of this page, then study the five images lettered A to E and select the radio button under the image that you feel looks most facially similar to the reference image. If you don’t think any of the faces lettered A to E look similar to the reference image, select the "None of the above" option below. If you make a pairing, please specify in the dropdown boxes the facial features you feel the similar-looking individuals share. If a particular feature did not play a role in your decision, please leave this box blank.
When you have viewed this example question, please click the "Next page" button.
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