I would say that one of the major effects of free indirect narration is to draw readers deeper into the narrative and, at times, to make them identify more closely with the character's point of view. Aligning the narrator's point of view with those of some of the characters may be a way to direct the readers' sympathies towards this rather than that character of a literary piece. Free indirect speech also eliminates the mediating power of the narrator, making the narrative more subjective and more fragmented rather than a unified whole. Free indirect speech makes the voice of the narrator less distinguishable from the thoughts of the characters. Thus, free indirect speech complements the narrator's perspective with those of the characters.