[QUOTE=Wellspotted;4397901]
So, do the people who compete in the upper levels of eventing do Grand Prix level for their dressage tests?[/QUOTE]
No. There is a set of tests written specifically for the dressage phase of eventing.
Beginner Novice tests: roughly equivalent to lower training level in the dressage world - walk/trot/canter with 20m circles and diagonals, free walk - however, like INTRO, many of the transitions are now done “gradually through the —”.
Novice tests: very straightforward, 20m circles, diagonals, walk trot canter. Essentially training level in the dressage world.
Training: somewhere between training and 1st level. The balance should be that of a 1st level horse, lengthenings at trot and canter are introduced, 15m circles are included. No lateral work, however.
Prelim: between 1st and 2nd. Reinback, shoulder-in, basic counter-canter, lengthened and medium gaits, 10m circles. Despite calling for medium gaits, the test does not ask the horse to show collection. Tests from here and up MUST BE DONE sitting the trot.
Intermediate: This is when the horse REALLY needs to start showing correct collection. This is more like true second level. Reinback, half turn on haunches, shoulder-in, haunches-in, simple changes, much more difficult counter-canter, medium gaits.
Advanced: Equivalent to 3rd level. Collected gaits, extended/medium gaits, half-pass, shoulder-in, single flying changes.
All of the FEI tests are more difficult than the USEA/USEF tests. Prelim=, Intermediate=2, Advanced=3* and 4*. At this point, I would say the 4* tests touch upon 4th level dressage. No pirouettes, but the quality of collection required is similar. The 4* tests are not easy to ride!