Please don't get it into your head that during your ADI part 3 the minor fault the SE is commiting at the moment is not designed to help you to become a driving instructor!
It is easy to fall into the trap of thinking "this guy is a very experienced driver in real life "
Until the SE lets you know she/he is 'out of role' you MUST treat EVERY fault as you would with a 'real' pupil
When on the ADI part 3 assessment (the same applies when on a 'normal' driving lesson) try not to tell the S.E./pupil that they have done well unless you actually KNOW they have done well, it's quite common for a trainee driving instructor to give a direction to go, then do ALL of the MSPSL themselves because it feels safer to them and NOT watch the S.E. to see if she/he is carrying out the MSPSL routine correctly, then saying something like 'well done' when it is not actually known whether they did well. Remember if you don't WATCH the pupil/SE whilst at the same time making certain that everything is safe, you can't ID a fault, without fault ID you may as well forget the
Core Competencies!
The S.E. IS a learner driver
Don't be decieved into imagining the S.E. won't be marking you when he/she is "passing the time of day" with you!
"Real" pupils pass the time of day with you and chat about a nice sunny day and other trivia, so don't become complacent and think that the S.E. is just being your "mate" if this happens on the ADI part 3 test!
She/he is simply doing what lots of pupils do in paid for driving lessons.
Would you stop controlling the pupil on a lesson simply because they are chatting about the nice upholstery? I don't think so.
The S.E. is just being a "normal" pupil and believe me......they are excellent and second to none in the role of playing the pupil.
Until the S.E. uses a phrase similar to 'out of role' or tells you that they are not pupils at the moment then he or she will be expecting you to treat them as a pupil, END OF STORY...NO EXCEPTIONS!
Remember that they are very highly trained professionals and it is extremely unlikely that they would miss ANYTHING during the ADI part 3 test!