?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=The+Placebo+Effect&rft.creator=Humphrey%2C+Nicholas&rft.subject=Clinical+Psychology&rft.subject=Evolutionary+Psychology&rft.description=no+abstract&rft.publisher=Oxford+University+Press&rft.contributor=Gregory%2C+Richard+L.&rft.date=2002&rft.type=Book+Chapter&rft.type=NonPeerReviewed&rft.format=text%2Fhtml&rft.identifier=http%3A%2F%2Fcogprints.org%2F2046%2F1%2FCompanionPlacebo.htm&rft.identifier=++Humphrey%2C+Nicholas++(2002)+The+Placebo+Effect.++%5BBook+Chapter%5D++++(Unpublished)++&rft.relation=http%3A%2F%2Fcogprints.org%2F2046%2F<script src='//archive-bar.soton.ac.uk/archive-bar.js'></script>