A presentation aid that calls attention to its poor production is a handicap, no matter how important the information it contains

What Yale psychologist studied World War II propaganda and developed a model of mass communication: who says what, in which channel, to whom, with what effect?

A) Walter Lippmann B) Harold Lasswell C) W.P. Davison D) Paul Lazarsfeld

Besides reiterating the central idea of your speec, the conclusion is also your last chance to

A) ask the audience how they would rate your speech-giving skills. B) inform the audience of other topics you considered speaking about. C) introduce new information. D) repeat your main ideas for the audience.