School principal Martin Chamberlain said he wasn't banning phones, but he was limiting their use.

Wanting to see more students out playing in the sunshine is the reason why he started turning off the school's wi-fi most of the time during morning tea and lunch breaks.

"It's really something that I've wanted to do for a long time but it's not until recently that we had the power to be able to shut down our wi-fi at set times and yet not dislocate the staff. The staff can still have use of it," he said.

The school operates two wi-fi networks, one for staff that stays on and another for students that turns off at certain times.

Chamberlain said the move wasn't about banning cell phones or the use of internet, but instead about managing how both were used.

"We see phones as an essential part of modern life so students are often invited to use their phone in class and to look up things on the web, and certainly we see them as a vital parental communication tool during breaks. So no, we're not Luddites; phones are a part of modern life," he said.

"But the other side of it is when I see students fixated onto screens, generally junior students who haven't been used to having this at their primary schools but now when they get it here they tend to make a feast of it."

Source

• stuff.co.nz
• Image: fdmcfoundation.com

Many conditions we're now familiar with were codified in the DSM, including body dismorphic disorder, schizophrenia and bipolar.

Inclusions and removals can be hugely controversial. Autism is in the manual, for example, but Asperger's isn't. Homosexuality was only removed in 1974.

Below, five experts explain some of the most noteworthy new additions, and why they've been included.

Hoarding disorder

David Mataix-Cols: Most children have collections at some point and approximately 30% of British adults define themselves as collectors. This is a pleasurable, highly social and benign activity, which contrasts with another disabling form of object accumulation: hoarding disorder.

The symptoms include persistent difficulty in discarding possessions due to a strong perceived need to save items and distress in discarding them. This results in the accumulation of a large number of possessions that fill up and clutter key living areas of the home, to the extent that their intended use is no longer possible.

Symptoms are often accompanied by excessive acquiring, buying or even stealing of items that are not needed or for which there is no available space.

Using DSM-5, hoarding disorder can only be diagnosed once other mental disorders have been ruled out.

With a prevalence of at least 1.5% of the UK population, the disorder is associated with substantial functional disability, family conflict, social isolation, risk of falls and fires, evictions and homelessness.

Binge eating disorder

Christopher Fairburn: The inclusion of binge eating disorder in DSM-5 was expected and uncontroversial for the deciding committee. It's already listed as a provisional diagnosis in DSM-IV.

The disorder is characterised by recurrent over-eating episodes and a sense of loss of control at the time. Sufferers don't have the extreme dieting, vomiting and laxative misuse seen in people who have bulimia. It is the loss of control over eating that is the distressing feature of binge eating disorder, or BED. Continue reading

Sources

• The Conversation
• Image: Sergei Yolkin's World, Voices from Russia
• See also: "Medicine's big new battleground: does mental illness really exist?" in The Guardian