Konstantin Stanislavski in the context of "Maxim Gorky"

Psychotechnique (A portmanteau of psychological technique) forms part of the 'system' of actor training, preparation, and rehearsal developed by the Russian theatre practitioner Konstantin Stanislavski. It describes the inner, psychological elements of training that support what he called "experiencing" a role in performance. In a rehearsal process, psychotechnique is interrelated with the "embodiment" of the role, in order to achieve a fully realised characterisation. Stanislavski describes the elements of psychotechnique in the first part of his manual An Actor's Work.

Stanislavski's system is a systematic approach to training actors that the Russian theatre practitioner Konstantin Stanislavski developed in the first half of the twentieth century. His system cultivates what he calls the "art of experiencing" (with which he contrasts the "art of representation"). It mobilises the actor's conscious thought and will in order to activate other, less-controllable psychological processes—such as emotional experience and subconscious behaviour—sympathetically and indirectly. In rehearsal, the actor searches for inner motives to justify action and the definition of what the character seeks to achieve at any given moment (a "task").

Later, Stanislavski further elaborated what he called 'the System' with a more physically grounded rehearsal process that came to be known as the "Method of Physical Action". Minimising at-the-table discussions, he now encouraged an "active representative", in which the sequence of dramatic situations are improvised. "The best analysis of a play", Stanislavski argued, "is to take action in the given circumstances."

A theatre practitioner is someone who creates theatrical performances and/or produces a theoretical discourse that informs their practical work. A theatre practitioner may be a director, dramatist, actor, designer or a combination of these traditionally separate roles. Theatre practice describes the collective work that various theatre practitioners do.

The term was not ordinarily applied to theatre-makers before the rise of modernism in the theatre. Instead, theatre praxis from Konstantin Stanislavski's development of his system is described through Vsevolod Meyerhold's biomechanics, Antonin Artaud's Theatre of cruelty, Bertolt Brecht's epic, and Jerzy Grotowski's poor theatre. Contemporary theatre practitioners include Augusto Boal with his Theatre of the Oppressed, Dario Fo's popular theatre, Eugenio Barba's theatre anthropology, and Anne Bogart's viewpoints.

Anton Pavlovich Chekhov (/ˈtʃɛkɒf/; Russian: Антон Павлович Чехов, IPA: [ɐnˈton ˈpavləvʲɪtɕ ˈtɕexəf]; 29 January 1860 – 15 July 1904) was a Russian playwright and short-story writer, widely considered to be one of the greatest writers of all time. His career as a playwright produced four classics, and his best short stories are held in high esteem by writers and critics. Along with Henrik Ibsen and August Strindberg, Chekhov is often referred to as one of the three seminal figures in the birth of early modernism in the theatre. Chekhov was a physician by profession. "Medicine is my lawful wife," he once said, "and literature is my mistress."

Chekhov renounced the theatre after the reception of The Seagull in 1896, but the play was revived to acclaim in 1898 by Konstantin Stanislavski's Moscow Art Theatre, which subsequently also produced Chekhov's Uncle Vanya and premiered his last two plays, Three Sisters and The Cherry Orchard. These four works present a challenge to the acting ensemble as well as to audiences, because in place of conventional action Chekhov offers a "theatre of mood" and a "submerged life in the text." The plays that Chekhov wrote were not complex, and created a somewhat haunting atmosphere for the audience.

Black light theatre (in Czech černé divadlo) or simply black theatre, is a theatrical performance style characterized by the use of black box theatre augmented by black light illusion. This form of theatre originated from Asia and can be found in many places around the world. It has become a speciality of Prague, where many theatres use it.

The distinctive characteristics of "black theatre" are the use of black curtains, a darkened stage, and "black lighting" (UV light), paired with fluorescent costumes in order to create intricate visual illusions. This "black cabinet" technique was used by Georges Méliès, and by theatre revolutionary Konstantin Stanislavski (especially in his production of Cain). The technique, paired with the expressive artistry of dance, mime and acrobatics of the performers is able to create remarkable spectacles.

The fourth wall is a performance convention in which an invisible, imaginary wall separates the actors from the audience. While the audience can see through this "wall", the convention assumes that the actors behave as if they cannot. From the 16th century onward, the rise of illusionism in staging practices—culminating in the realism and naturalism of the theatre of the 19th–century—led to the development of the fourth wall concept.

The metaphor relates to the mise-en-scène behind a proscenium arch. When a scene is set indoors and three of the room's walls are depicted onstage—forming what is known as a box set—the "fourth" wall lies along the line (technically called the proscenium) dividing the stage from the auditorium, effectively where the audience sits. However, the fourth wall is a theatrical convention, not a feature of set design. Actors ignore the audience, focus entirely on the fictional world of the play, and maintain immersion in a state that theatre practitioner Konstantin Stanislavski called "public solitude" —the ability to behave privately while being observed, or to be "alone in public." This convention applies regardless of the physical set, theatre building, or actors' proximity to the audience. In practice, actors often respond subtly to audience reactions, adjusting timing—particularly for comedic moments—to ensure lines are heard clearly despite laughter.

The "art of representation" (Russian: представление, romanized: predstavlenie) is a critical term used by the seminal Russian theatre practitioner Konstantin Stanislavski to describe a method of acting. It comes from his acting manual An Actor Prepares (1936). Stanislavski defines his own approach to acting as "experiencing the role" and contrasts it with the "art of representation". It is on the basis of this formulation that the American Method acting teacher Uta Hagen defines her recommended Stanislavskian approach as 'presentational' acting, as opposed to 'representational' acting. This use, however, directly contradicts mainstream critical use of these terms. Despite the distinction, Stanislavskian theatre, in which actors 'experience' their roles, remains 'representational' in the broader critical sense.

The term given circumstances is a principle from Konstantin Stanislavski's methodology for actor training, formulated in the first half of the 20th century at the Moscow Art Theatre.

The term given circumstances is applied to the total set of environmental and situational conditions which influence the actions that a character in a drama undertakes. Although a character may make such choices unconsciously, the actor playing the character is aware of such conditions on a conscious level to help him or her deepen his or her understanding of the motivation behind the character's actions. Given circumstances include conditions of the character's world (e.g. specifics of time and place: in Hamlet for instance, being in Elsinore at a specific time in history is a given circumstance), elements from the history of the character's environment (e.g. Hamlet: the death of the old King Hamlet preceding the play's plot is a given circumstance), and elements from the character's personal situation (e.g. Hamlet: the character Hamlet is a crown prince).