Fundamentally, it pertains to "the scope of sensory access and knowledge acquisition and dispersion, and to peoples horizons as social actors Janelle (1973) claims that personal extensibility is "conceptually the reciprocal of time-space convergence" p. 11), and argues that the rapid advances in communication and transportation technologies and their associated institutions imply a "shrinking world", with expanding opportunities for extensibility That is, the focal point of this theory lies in the expansion of opportunities for human interaction, rather than improved abilities for movement over greater distances.