Before revision: Refining the hypothesis Although by the mid-1970s extensive data supported the existence of a knowledge gap among low and high socioeconomic status individuals, Donohue, Tichenor, and Olien (1975)sought to refine the hypothesis to determine under what conditions the knowledge gap might be attenuated or even eliminated.
After revision: Although by the mid-1970s extensive data supported the existence of a knowledge gap among low and high socioeconomic status individuals, Donohue, Tichenor, and Olien (1975)sought to refine the hypothesis to determine under what conditions the knowledge gap might be attenuated or even eliminated.