The Abramovic Method is Abramovic’s adaptation of her Cleaning the House workshops for the general public. The method helps participants to develop skills for observing long durational performances through a series of exercises and environments designed to increase awareness of their physical and mental experience in the moment. Abramovic will install this method at MAI via a series of chambers, each dedicated to one of these exercises.
Maybe that's why Gaga was blindfolded and had her hands raised in the air. She had to rely on her other senses. I've read about that exercise in a book.