If a hard day in the office leaves you crabby and uncooperative, you may have an excuse: scientists say exercising self-restraint can exhaust parts of the brain related to decision-making and impulse control, leaving you less able to manage your behaviour towards others.
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Michael Inzlicht, a professor of psychology at the University of Toronto who was not involved in the study, urged caution noting most of the behavioural results did not show significant effects, while the connection between brain and behaviour was not strong.
“These are interesting results and are consistent with a commonsense view of fatigue,” he said. “But given all the past controversy and the weakness of this data, I would want to see if they were replicated independently before calling the press about it.”