How does initial credibility differ from derived credibility?

Initial credibility is the audience's perception at the beginning of the speech, while derived credibility is the

audience's perception throughout the speech

Initial credibility is the speaker's credibility at the end of the speech, while derived credibility is the speaker's

credibility at the beginning of the speech

Initial credibility is the audience's perception of the speaker's character, while derived credibility is the audience's

perception of the speaker's competence

Initial credibility is based on the speaker's appearance, while derived credibility is based on the speaker's expertise