“…Our experience in teaching speech communication, however, indicates that there are differences in listening skill, both among individuals and between times of testing. In fact, courses in speech, even without specific instruction in listening, have led to improvement in students' ability to listen (Becker & Dallinger, 1960;Meyer & Williams, 1965;Cottrill & Alciatore, 1974). "Memory," as such, should not be subject to such variation.…”