Editor's note

The Christchurch attacks shocked the world and many people found themselves switching on the TV news to better understand what was going on. But how does this affect your mental health? The more footage you watch, the more likely you are to experience psychological distress, explains Richard Bryant, especially if you’re watching from the gunman’s perspective.

And in the aftermath of the attacks, writes Denis Muller, there is an ethics lesson for the professional media, many of whom failed the “test of necessity” by broadcasting the violence. Whether social media published it or not is immaterial, Muller argues – the weakest reason for publishing something is that someone else already has.

Meanwhile, autonomous transport is coming our way, but we do have a choice about what form it takes. Peter Newman argues “trackless trams” are a better bet than driverless cars to give us people-friendly cities.

Fron Jackson-Webb

Deputy Editor/Senior Health + Medicine Editor

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The attack is likely to have enduring psychological effects for those at the scene. Mick Tsikas/AAP

How to take care of your mental health after the Christchurch attacks

Richard Bryant, UNSW

It's distressing to see reports of terrorists attacks but these feelings will usually abate over days or weeks. But people with a history of trauma need to take extra care of their mental health.

The difference in the Christchurch attacks is that propaganda supplied by the perpetrator was available to the professional media, even as the story was breaking. Wes Mountain/The Conversation

Christchurch attacks provide a new ethics lesson for professional media

Denis Muller, University of Melbourne

On the day of the Christchurch mosque shootings, several media outlets repeatedly failed the test of necessity in showing graphic footage.

Cities have a choice of autonomous vehicle futures: cars or mass transit vehicles. Which one we adopt is likely to determine how people-friendly our cities are. SueBeDoo888/Shutterstock

Autonomous transport will shape our cities’ future – best get on the right path early

Peter Newman, Curtin University

Autonomous mass transit vehicles like 'trackless trams' are a better bet than autonomous cars to give us people-friendly cities that capture the value created by infrastructure for the common good.

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