Received: 1 March 2019
Accepted: 21 June 2019
First Online: 29 July 2019
Ethics approval and consent to participate
: The University’s School of Psychology Research Ethics Committee approved all the experiments presented here (approval code PSY171881) which were carried out in accordance with the provisions of the World Medical Association Declaration of Helsinki. In all experiments, participants provided written informed consent before taking part.
: The photographer (Fig. InternalRef removed) and individuals portrayed provided consent for the images to be used in this publication.
: The authors declare that they have no competing interests.