1 The Effect of Physical Exertion on Witness Memory Witnesses in action: The effect of physical exertion on recall and recognition Lorraine Hope University of Portsmouth William Lewinski Force Science Justin Dixon Metropolitan Police, Physical Education Branch David Blocksidge Metropolitan Police, Force Firearms Unit (Research) Fiona Gabbert University of Abertay AUTHORS’ PRE PRINT MANUSCRIPT The final corrected version of this manuscript is published as a Research Report in Psychological Science, 23(4) 386–390, DOI: 10.1177/0956797611431463 Link to full article: http://pss.sagepub.com/content/early/2012/03/07/0956797611431463.full Corresponding Author: Lorraine Hope, University of Portsmouth, Department of Psychology, King Henry I St., Portsmouth PO1 2DY, United Kingdom E-mail: lorraine.hope@port.ac.uk