1. Training in speech and changes in personality
2. Leyden, Ralph. 1941. “An Experimental Study of the Effects of Speech Training at the Secondary School Level,”. University of Minnesota. M.A. Thesis
3. Lomas, Charles. 1934. “A Study of Stage Fright as Measured by Student Reactions,”. Northwestern University. M.A. Thesis
4. Factors related to achievement and improvement in public speaking