Hard Evidence: Is the teenage brain wired for addiction?

The younger you are when you have your first alcoholic drink, the more likely you are to develop problems later on in life.

As a nation, we are drinking much more than we used to, which is partly attributable to alcohol being cheaper and more available than ever. Many British teenagers get into the habit early, although recent trends suggest this situation is improving (alcohol consumption among teenagers is slightly lower than it was ten years ago).

Nonetheless, drinking alcohol during adolescence is not a good idea, because the younger you are when you have your first alcoholic drink, the more likely you are to develop problems later on in life. The same is true for cigarette smoking and the use of illicit drugs such as cannabis and cocaine.

Rates of teenage drinking are dropping. NatCen

 

Arrested development

Why are adolescents particularly vulnerable to addiction? A large part of the answer comes from our understanding of the neurobiology of brain development during adolescence. The brain does not reach maturity until fairly late in life, with new connections between brain cells being formed right up until people are in their mid-20s.

Importantly, the brain does not mature at a uniform rate. The more primitive regions of the brain, including the reward system and other areas of the subcortex such as those parts that process emotions, reach maturity relatively early (when people are in their early teens).

The prefrontal cortex is a late bloomer. National Institute of Health

The more “advanced” parts of the brain, such as the prefrontal cortex, are not fully developed until much later. In behavioural terms this means adolescents are particularly sensitive to their emotions and to things that are novel and motivationally appealing, but they are relatively unable to control their behaviour and plan for the future.

Taking risks

My research suggests this can explain why some adolescents drink more than others: teenagers who were relatively poor at exerting self-control, or who took more risks on a computer test of risk-taking, were more likely to drink heavily in the future.

This creates perfect conditions for vulnerability to addiction during adolescence, because the motivational “pull” of alcohol and other drugs is very strong, whereas the ability to control behaviour is relatively weak. Many scientists think if adolescents do drink a lot, and if they do it frequently, then this might cause long-lasting changes in the way that the brain is organised, which can make it very difficult to stop drinking.

We certainly see changes in the brains of people with alcohol problems (compared to people without problems), but it can be difficult to work out if alcohol caused those brain changes, or if those people had slightly different brains before they started drinking, and these subtle differences may have led them to start drinking in the first place.

Starting early carries greater risk. NatCen

 

Addiction and behaviour

In principle, adolescent brains could be vulnerable to “behavioural” addictions as well as alcohol and drug addiction, for exactly the same reason. Very few behavioural addictions are officially recognised by psychiatrists and psychologists at the moment (gambling addiction is the only exception).

The Channel 4 documentary Porn on the Brain shown this week asked whether pornography is addictive, and if adolescents could be getting hooked. As shown in the programme, it certainly seems to be the case that a minority of adolescents who use pornography exhibit some of the characteristic features of addiction, such as feeling unable to control their use of porn, and loss of interest in other activities.

Their patterns of brain activity when viewing porn seem to be similar to those seen in people with alcohol and drug addictions when they look at pictures of alcohol and other drugs. It remains to be seen whether addiction to porn will eventually be recognised as a psychological disorder, but it is clear that it can create problems for some adolescents and young adults who use it.

What can be done? Although it’s obvious, parents should do what they can to prevent their children from experimenting with alcohol, smoking and other drugs for as long as possible. The same applies to other things that might eventually be considered “addictive”. School-based prevention programmes can also be successful, including a recent program that is tailored to different personality types and has shown some promise at reducing alcohol consumption in teenagers.

Hard Evidence is a series of articles in which academics use research evidence to tackle the trickiest public policy questions.

Matt Field receives funding from the Medical Research Council, Economic and Social Research Council, Wellcome Trust, British Academy and Alcohol Research UK. He is affiliated with the UK Centre for Tobacco and Alcohol Studies.

This article was originally published at The Conversation. Read the original article.

Teenages making a toast in a pub. Photo: Getty

Matt Field is Professor of Experimental Addiction Research at the University of Liverpool.

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“Stinking Googles should be killed”: why 4chan is using a search engine as a racist slur

Users of the anonymous forum are targeting Google after the company introduced a programme for censoring abusive language.

Contains examples of racist language and memes.

“You were born a Google, and you are going to die a Google.”

Despite the lack of obscenity and profanity in this sentence, you have probably realised it was intended to be offensive. It is just one of hundreds of similar messages posted by the users of 4chan’s Pol board – an anonymous forum where people go to be politically incorrect. But they haven’t suddenly seen the error of their ways about using the n-word to demean their fellow human beings – instead they are trying to make the word “Google” itself become a racist slur.

In an undertaking known as “Operation Google”, some 4chan users are resisting Google’s latest artificial intelligence program, Conversation AI, by swapping smears for the names of Google products. Conversation AI aims to spot and flag offensive language online, with the eventual possibility that it could automatically delete abusive comments. The famously outspoken forum 4chan, and the similar website 8chan, didn’t like this, and began their campaign which sees them refer to “Jews” as “Skypes”, Muslims as “Skittles”, and black people as “Googles”.

If it weren’t for the utterly abhorrent racism – which includes users conflating Google’s chat tool “Hangouts” with pictures of lynched African-Americans – it would be a genius idea. The group aims to force Google to censor its own name, making its AI redundant. Yet some have acknowledged this might not ultimately work – as the AI will be able to use contextual clues to filter out when “Google” is used positively or pejoratively – and their ultimate aim is now simply to make “Google” a racist slur as revenge.


Posters from 4chan

“If you're posting anything on social media, just casually replace n****rs/blacks with googles. Act as if it's already a thing,” wrote one anonymous user. “Ignore the company, just focus on the word. Casually is the important word here – don't force it. In a month or two, Google will find themselves running a company which is effectively called ‘n****r’. And their entire brand is built on that name, so they can't just change it.”

There is no doubt that Conversation AI is questionable to anyone who values free speech. Although most people desire a nicer internet, it is hard to agree that this should be achieved by blocking out large swathes of people, and putting the power to do so in the hands of one company. Additionally, algorithms can’t yet accurately detect sarcasm and humour, so false-positives are highly likely when a bot tries to identify whether something is offensive. Indeed, Wired journalist Andy Greenberg tested Conversation AI out and discovered it gave “I shit you not” 98 out of 100 on its personal attack scale.

Yet these 4chan users have made it impossible to agree with their fight against Google by combining it with their racism. Google scores the word “moron” 99 out of 100 on its offensiveness scale. Had protestors decided to replace this – or possibly even more offensive words like “bitch” or “motherfucker” – with “Google”, pretty much everyone would be on board.

Some 4chan users are aware of this – and indeed it is important not to consider the site a unanimous entity. “You're just making yourselves look like idiots and ruining any legitimate effort to actually do this properly,” wrote one user, while some discussed their concerns that “normies” – ie. normal people – would never join in. Other 4chan users are against Operation Google as they see it as self-censorship, or simply just stupid.


Memes from 4chan

But anyone who disregards these efforts as the work of morons (or should that be Bings?) clearly does not understand the power of 4chan. The site brought down Microsoft’s AI Tay in a single day, brought the Unicode swastika (卐) to the top of Google’s trends list in 2008, hacked Sarah Palin’s email account, and leaked a large number of celebrity nudes in 2014. If the Ten Commandments were rewritten for the modern age and Moses took to Mount Sinai to wave two 16GB Tablets in the air, then the number one rule would be short and sweet: Thou shalt not mess with 4chan.

It is unclear yet how Google will respond to the attack, and whether this will ultimately affect the AI. Yet despite what ten years of Disney conditioning taught us as children, the world isn’t split into goodies and baddies. While 4chan’s methods are deplorable, their aim of questioning whether one company should have the power to censor the internet is not.

Google also hit headlines this week for its new “YouTube Heroes” program, a system that sees YouTube users rewarded with points when they flag offensive videos. It’s not hard to see how this kind of crowdsourced censorship is undesirable, particularly again as the chance for things to be incorrectly flagged is huge. A few weeks ago, popular YouTubers also hit back at censorship that saw them lose their advertising money from the site, leading #YouTubeIsOverParty to trend on Twitter. Perhaps ultimately, 4chan didn't need to go on a campaign to damage Google's name. It might already have been doing a good enough job of that itself.

Google has been contacted for comment.

Amelia Tait is a technology and digital culture writer at the New Statesman.