All the 'studies' that claim that it affects the development of the brain are more speculation and disinformation/misinformation. A compilatioon of propaganda to assist in the scare tacticts of the 'war on drugs' and pure guess work.
There have been no 'official' legitimate scientific evaluations of people to determine long term effects of marijuana on any part of the body that have been made public.
In fact, the mandate of all official research projects has been to prove the harmful effects and to dissuade the public from using MJ .That is why the US made it illegal for any independant body to conduct studies into its benefits.
The various powers that be have no interest in entering into a study that they know will eventually disprove all of their falasies. There are people who have been using medical marijuana for decades yet the US government is not interested in the long term health of these people in regards to their MJ use since these people are walking talking examples that it doesnt affect you the way they say it does.
We all experience different short term effects though so I speculate we can show varying levels of long term effects.
I dont feel any less intelligent than I did as a youth prior to smoking. I was always a straight A student and its effects on my brain never negatively impacted my education. I have smoked for 15 years now.
In contrast, I find that it can actually enhance my thought processes and open possibilities in thought processes that I was previously blinded to. If used appropriately and moderately you shouldnt have a problem rememebering how to tie your shoes.
If it does, buy velcro.


Oh BTW there are things you should be focusing on in life as a 14 yr old and recreational intoxication isnt one of them in my opinion. My daughter is 12 and she has mcuh to learn before being responsible enough to use any mind altering substances for fun. Thats my opinion, not shared by everyone.
I was 16 when I started and if I could do it again I would wait until I was 18 simply due to maturity and responsibility.

peace.