In recent years an increasing number of psycho-analysts have concerned themselves with the detailed study of the therapist-patient interaction. Recording of interviews with modern techniques has been employed with the aim of obtaining objective data. Many psycho-analysts regard the taking of notes during treatment as harmful to the therapeutic process. The idea of a complete sound recording of sessions, which at the same time are being watched through the one-way mirror, must appear to them a major offence against basic therapeutic principles. Nevertheless, some psycho-analysts and psycho-analytically orientated psychiatrists have been bold enough to disregard the taboos protecting the