I'm a bit doubtful that 'unfamiliar environment' will carry much weight, as it presumably applies to all children who took the late selection test? If you have evidence that he's a very sensitive child who always reacts badly to unfamiliar surroundings, it might be different.
Were you made aware of how the testing was to be done, and was there an opportunity to raise any concerns and/or request adjustments?
The problem with "hearing impaired children typically have a poorer vocabulary than their hearing peers
" is that you are putting forward a case for a particular child who may or may not be typical. Is there evidence that his
vocabulary was insufficient to allow him to access the tests?
Research is one thing, but it would be infinitely better if you had evidence from a professional supporting the view that your
son would have been disadvantaged.
With a gap of just one mark, you actually need very little in the way of extenuating circumstances. Personally I think there's a risk your review/appeal will lack balance. It would probably be enough to ask the panel to take into account that he is stronger on the maths/science side! - while letting any medical evidence speak for itself.
In my view you should focus much, much more on putting forward an academic case:http://www.elevenplusexams.co.uk/appeal ... cation#b11
See also:http://www.elevenplusexams.co.uk/appeal ... cation#b21
History of fluctuating hearing loss which unexpectedly became permanent at the beginning of year 6 but not diagnosed until half way through year 6 and subsequent hearing aid not fitted until end of year 6, impacting on his key stage 3 stats-Reading 5, writing 4, Math 5
It would be very helpful if the current head could confirm that he is now making accelerated progress.
If she has asked for advice, perhaps her attention could also be drawn to:http://www.elevenplusexams.co.uk/appeal ... cation#b41http://www.elevenplusexams.co.uk/appeal ... cation#b48
Hope this helps.