All authors participated in all aspects of this paper: design, testing participants, data collection and analysis, manuscript preparation.
Following preliminary testing, participants were familiarised with the exercise protocols in which they would be participating in during the experimental trials.
Such internalized photoshoppery is not simply the result of an all-purpose preference for prettiness: when asked to identify images of strangers in subsequent rounds of testing, participants were best at spotting the unenhanced faces.
Prior to testing, participants took part in a training that was identical for both conditions.
After testing, participants are asked to fill out our designed questionnaires containing the following parts.
The last section comprised ten questions, testing participants' knowledge of the theory of evolution.
This was achieved by testing participants in two different learning situations.
During pilot testing, participants indicated that rotating unfamiliar objects without an obvious "up" orientation did not present any problems.
Instead, the experimenter referred to the landmark scenes by using photographs of each landmark when testing participants' spatial knowledge.
During testing, participants wore full hockey gear, with the exception of shoulder pads so as not to interfere with the electrodes placed on the upper chest and back.
For experimental trials, 30 min prior to performance testing, participants chewed 2 mg (NIC-2) or 4 mg (NIC-4) nicotine or a flavour-matched placebo (PLA) gum, the order of which was randomised using a Latin square design.
