According to a source (https://nofilmschool.com/what-is-the-french-new-wave#:~:text=Techniques%20included%20fragmented%2C%20discontinuous%20editing,French%20New%20Wave%20was%20born.) ‘Techniques included fragmented, discontinuous editing, and long takes that allowed actors to explore a scene. The combination of realism, subjectivity, and commentary allowed these movies to have ambiguous characters, motives, and even endings that were not so clear-cut’. 

‘The “right bank” group is constituted of the more famous and financially successful New Wave directors associated with Cahiers du cinéma (Claude Chabrol, François Truffaut, and Jean-Luc Godard). Unlike the Cahiers group, Left Bank directors were older and less movie-crazed. They tended to see cinema akin to other arts, such as literature. However, they were similar to the New Wave directors in that they practiced cinematic modernism. Their emergence also came in the 1950s and they also benefited from the youthful audience. The two groups, however, were not in opposition…… The filmmakers tended to collaborate with one another’. 

Source – (https://en.wikipedia.org/wiki/French_New_Wave#:~:text=to%20do%20essays.%22-,Left%20Bank,older%20and%20less%20movie%2Dcrazed.)