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Summary form only given. Electromagnetically induced transparency (EIT) is a process by which a normally absorbing material is made transparent by application of electromagnetic radiation. It has a number of applications, including lasing without inversion and slow light. We see that the EIT resonances corresponding to the hyperfine levels are either inhibited, or enhanced depending on the position of the hyperfine transitions in relation to the applied rf field. We discuss the role of level splitting (destruction of EIT) and three photon resonance peaks in the resulting spectra. A 2 cm rubidium cell, heated to approximated 60 C is probed with a 780 nm laser.