1. Highlander, John. 1953. “Audience Analyzer Measurements and Informational Effects of Speaker Variables in Radio Talks,”. Wisconsin unpubl. diss.
2. Haiman, Franklyn. 1948. “An Experimental Study of the Effects of Ethos in Public Speaking,”. Northwestern unpubl. diss.
3. Bettinghaus, Erwin. 1959. “The Operation of Congruity in an Oral Communication Situation,”. Illinois unpubl. diss.