Behav Processes 2015 Jan 16;110:88-95. Epub 2014 Sep 16.
Department of Psychology, The University of Lethbridge, 4401 University Drive, Lethbridge, Alberta T1K 3M4, Canada; Applied Behavioural Ecology and Ecosystems Research Unit, Department of Environmental Sciences, University of South Africa, P.B. X6, Florida 1710, South Africa. Electronic address:
Am J Hum Biol 2014 Jul-Aug;26(4):530-7. Epub 2014 May 12.
Department of Sociology, University of Groningen, Grote Rozenstraat 31, 9712 TS, Groningen, The Netherlands; Department of Population Health, London School of Hygiene and Tropical Medicine, London, WC1E 7HT, UK.