I concur Martin. Though if we use something like an IQ test then I would fall into the 98th centile of population. Now it is entirely possible that I could be in the 99th centile if I ate meat or maybe the 97th, it is only one data point, however its one who's place I am content with 
However, as I said, should you wish to gain a larger sample size it IS there should researchers wish.
Whilst Michiel may have their mum as a GP my other half is a paedeatrician specializing in early-childhood development. There are aspects of diet which can affect development (iodine an omega-3 two name a couple). But these are not limited to people of a vegetarian diet.
Once again, I am always happy to be proven wrong.
However, as I said, should you wish to gain a larger sample size it IS there should researchers wish.
Whilst Michiel may have their mum as a GP my other half is a paedeatrician specializing in early-childhood development. There are aspects of diet which can affect development (iodine an omega-3 two name a couple). But these are not limited to people of a vegetarian diet.
Once again, I am always happy to be proven wrong.