When I was 'let loose' teaching Tristar tech at Cranebank, I was rostered for a monthly tech refresher session. Nominated pilots turned up and sat at 'wired up' desks which had 'responder buttone to react to multi choice questions. Session started and one late arrival rushed in and took a seat. On the instructor's desk there were rows of lights indicating the selections made by the 'victims'. As we progressed, one such was slow to react and frequently wrong. Eventually I had to stop and ask if this chap was feeling OK. The problem was quickly sorted - he was a 747 student and in the wrong room !