Procedure
Participants were informed that this was a study of individual differences in motivation and reward that involved completing computerised tests of attention and reaction time, along with questionnaires about personality and mood. They were seen between 1pm and 6pm and instructed to refrain from eating for three hours before the study because the cognitive processes under investigation “are sensitive to blood glucose levels and we want all participants to have similar levels of glucose deprivation”. Whilst studies into ego-depletion indicate that this may be true (Masicampo & Baumeister, 2008, but see Inzlicht, Schmeichel, & Macrae, 2014), these instructions were designed to limit participants' awareness that we were really looking at hunger state and food consumption.