These gamers also took the Moral Foundations Questionnaire (you can take the self-scorable test, here) to evaluate their psychological foundations of morality, such as whether they value loyalty to a group or whether they respect authority.

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The exercise was conducted in 2003 through the voluntary completion of a questionnaire by drivers who had failed or refused a breath test or who when tested passed on amber which indicated the presence of alcohol in their breath.

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Each person was given a questionnaire in which they made choices between a smaller, immediate reward and a larger future reward (a common test for finding out if people are willing to delay gratification).

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