Primitive mode of representation was dominant before then being replaced by IMR, mainly dominant in Hollywood cinema.
The concept was developed by Noel Burch in his 1969 book Praxis du cinĂ©ma. Burch’s goal is to show that the IMR was a class-determined practice, developed out of the bourgeois desire for totalizing illusionistic representation. Andre Bazin had identified the “myth of total cinema,” moreover a constant desire to represent reality as completely as possible, which he claimed as the root of cinema innovations (sound,colour and technology).
IMR's aim was to involve the audience and make them feel apart of what is going on on-screen in a fictional world. Things such as close ups helped the audience to see the full emotion of the characters on screen, engaging the audience thoroughly.
The 'Primitive Style'
The primitive style of movie-making is a pre-dated classical Hollywood's continuity system or melodramatic mime. These techniques include frontal staging or a tableau style, exaggerated gestures, hardly any camera movement and no point of view shots. Early cinema was also silent and unsophisticated, more like melodramatic mime.
Classical Hollywood style
It designated both visual and sound style for making motion pictures and a mode of production used in the american film industry. Classical style is based upon continuity editing , there was an advanced change in editing techniques, camera distancing, sound and a more complex plot. The voyage to the moon was the first complex film to be made in 1902 and is one of the greatest films of all time as it was the first introduction to Classical Hollywood Style. In the video here you can clearly see the difference between Primitive and Classical Hollywood Style film.