Kuleshov effect
The Kuleshov Effect was an experiment in the 1910s by Lev Vladimirovich Kuleshov. It is part of Soviet montage theory. It connects to montage, which is an editing technique. The principle was that images next to another image add meaning. Two images next to each other have a deeper meaning than just one image. Editing also created deeper emotions. The principle was also that viewers already had mental images about a picture.  Kuleshov and other Soviet theorists believed this was a basis for film. They said the film is a collection of images next to each other.