Which action is least likely to enhance a speaker's credibility before discussing their topic?

Using a significant amount of statistical presentation aids is least likely to enhance a speaker's credibility before discussing their topic because while statistics can be informative, they do not inherently establish a personal connection or credibility related to the speaker's expertise or experience in the subject matter. Personal stories, for example, can create an emotional bond and demonstrate the speaker's personal investment in the topic, which helps to build trust with the audience. Demonstrating expertise shows that the speaker possesses knowledge and skills relevant to the subject, while establishing rapport fosters a relationship and openness between the speaker and the audience.

In contrast, an overload of statistical information might come across as impersonal or confusing, and without context, the statistics may not effectively convey the speaker's credibility. It’s important to balance statistical evidence with personal engagement and demonstrable knowledge to truly enhance credibility in a presentation.