But you could also (theoretically at least) pass if you got high marks on scales and aural even if you failed your pieces. This would show that the person had some musicality (otherwise they would have failed the aural) but says little about their ability to play musically the instrument they were examined on.
You're right of course, although scales and sightreading do require at least some ability to play the instrument in some way. This reminds me of a point I've been thinking of for a while; but never got around to starting a thread on. If someone tells us they have passed grade 8 does that actually tell us anything about their standard of playing? Is a grade really a standard? For example,
The 27,27,26 on pieces and free marks for everything else scenario: the person may not even be able to read music, or know anything about aural, or know what a scale is.
Another scenario could be the person gets full marks on supporting tests so 21, 21, 18 a total of 60 marks and then gets 13, 13, 14 for the pieces (I've not looked at the marking criteria, but I'd guess this translates to an almost recognisable standard of playing).
And obviously there are all marks on the spectrum in between these. The fact is, without knowing anything about the breakdown of the person's marks, we can't solidly definitely conclude anything about their ability to play really, even knowing they've got grade 8
Then there's the key minefield of time taken to learn pieces, clearly someone who gets the same mark at grade 8 with 2 weeks' work was of a higher standard than someone who took 2 years to do the same thing. Add to that the conundrum of marks too, grade 8 distinction standard isn't the same as grade 8 pass standard, and is grade 7 distinction standard higher than grade 8 pass standard? What happens then
It's fascinating: if I decided tomorrow to start playing grade 8 pieces or working towards the grade 8 exam I could perhaps say I was 'grade 8 standard' (by some people's definition and more liberally in a few months' time when I could play the pieces to pass standard); I could work on grade 6 pieces and be grade 6 standard, or I could have a crisis of confidence, go back to working on grade 4 pieces and be grade 4 standard
The more I think 'what does a grade tell us about someone's playing' the more I think 'it tells us the difficulty of the pieces they chose to play'. Anyone have any insights?
