Numquid vere cannabis summitte IQ?

Does cannabis really lower your IQ?

Cannabis quam mihi nuper investigationis ostendit differentias agitur multum distent usus causando actum cognitivae


Powered by Guardian.co.ukHic titulus “Numquid vere cannabis summitte IQ?” erat scriptum a Claire Mokrysz, on Monday June 14th ad theguardian.com 2016 15.24 UTC

An uti potest ad cannabis Hot topic investigationis et publica est cognoscitiva incom. Datum multa media attentionem licet Inventiones suadeant ut detrimentum effectus in cannabis cognitio, cerebrum munus atque sanitatem mentis, et dimittetur illi pro se ratus erat assimilatur ad spliff fumigantium iterum te in bashing caput potens Bong. Autem, tantum opus est quo crucem-Lorem date (ille est, mensuras nisi simul in vita sunt), si fieri potest, non sciunt aliter quam si cannabis users sunt coepi usura cannabis. Denique, nos adversus cum classic "pullum vel ovum" problema.

Cannabis vacuum non cadit in usus. Eleifend et cannabis satus usura a iuventute quae ab his qui non tentant et fere certe, commorantibus aut maiores sunt. Qui testimonium suggerit satus usura a iuventute saepe cannabis minus firma loca atque magis morum quaestiones nisi per pares suos, et non. Teenage cannabis etiam typice usus est in manu tua alio medicamento usus in genere et periculosum lifestyle choices. Pauperes igitur cognitio perfecta et cannabis users may praecessi ex utor alia cum cannabis, sed uti se cannabis. Sed certe difficilius est temperare enim omnia alia.

Conantur ad armamentisque haec exitibus, cum aliis investigatores a University of College London (Suzi Gage exercituum, qui etiam hoc blog), Ego fuerint in novum studio, Inventiones mirum, cum potentia. Usura notitia 2235 de collectis autem quae teenagers «Filii et XC scriptor" cohors Africum Angliae,, quotiens aspeximus nos inter nuntiatum ab aetatis usus cannabis 15, IQ test et in ludicris expletum aetatis. Adipiscing IQ test aliquando etiam cum adulescentibus 8 annos habet (quis usus ex iis qui ante cannabis), ita possemus armamentisque "ovum gallinaceum," forsit.

In primo results nobis eleifend id, quod deterius est, qui fuerat in teenage IQ expertus perfecerunt cannabis, et secundum rationem, baseline, at IQ 8 annos habet. Cannabis etiam qui solum paucis fere tempore foedum 2 IQ locis inferior quam qui umquam conatus cannabis. Autem, Notandum etiam, quod multo credibilius eleifend quis usus fuerat Montibus cannabis, Vocatus et illicita alia pharmaca- et haec omnia praedicta et Imago inferior ustulo IQ. Maxime users etiam multo magis nos, qui cannabis esse cigarette tobacco smokers- 84% ex his in usum nostrum gravissimum cannabis Group (qui eis usi vel Cannabis 50 a temporibus saeculi 15) cigarettes fumabat, eo magis, quam 20 et in temporibus suis, comparatur ad iustum 5% eorum qui numquam cannabis.

Cum adaequatum statistically differentia, quia in his rates of substantia usum, cum pueritia, alius officina quos possidet symptoms mentis et morum quaestiones, Cannabis non uti inferior IQ praedixit ustulo. Post hoc temperatio etiam maxima coetus cannabis users IQ praedixit ustulo non est alius, qui numquam conatus cannabis. Nos similis analysis et cucurrit ad GCSE gradus in schola in eadem teenager, qui sedit annos 15/16. Inventa similem inventis ad IQ- cum cannabis fieri users ad GCSE gradus inferior (in equivalent 2 inferioris gradus, in uno subiecto,), ob haec cum ita se res habet, non praedicuntur cannabis usum scholae fit deterior.

It seems therefore that there is something else about these two groups of teenagers (those who had used cannabis by age 15 and those who had not) that is responsible for the differences in IQ and school grades, rather than their cannabis use, though it’s not clear what from our study. Although cigarette smoking was identified as a potentially important factor, we clearly can’t know from this type of study whether it actually causes lower IQ and school performance, and there is little evidence elsewhere to suggest this is the case.

While this may sound like great news for those 15% autem 15-24 year old Europeans who have used cannabis in the past year, the take home message is sadly not so clear cut. This is just one study from one cohort in one area of England, and as authors of the paper we are the first to acknowledge the limitations of this work, including the young age of the participants when we measured IQ, and the relatively moderate levels of cannabis use.

A well-publicised study from 2012 suggested that cannabis use starting in adolescence and persisting into mid-life “is” related to IQ decline. So how do these potentially opposing findings fit together? The key difference between autem 2012 Study and ours is the type of cannabis users included in the study. Our heaviest using teenagers had been using cannabis for approximately 2 annis, and had used cannabis at least 50 times each (quamquam 57% of this group reported having used cannabis at least 100 times). In 2012 study those who showed the most dramatic IQ decline had been persistent cannabis users from adolescence until their late 30’s, and had been diagnosed with cannabis addiction at numerous points in their life. So it’s possible that cannabis addiction, rather than cannabis use per se, is related to lower IQ, or that persistent heavy cannabis use throughout your lifetime can to have these negative effects.

Our study is by no means definitive, but it does highlight that we should all be more cautious when jumping to conclusions about the harms of a drug before we have strong evidence either way. Overly forceful conclusions about the potential negative effects of cannabis are unscientific and based on an incomplete evidence base. This can lead to the unfair marginalisation of teenagers who use cannabis, which is the last thing we would want, given that this group is likely to include some of the most vulnerable in society.

Claire Mokrysz is a PhD student at University College London investigating whether teenagers are particularly susceptible to harm from cannabis and alcohol use.

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