Credible Source: There are certain ads that contain credible source elements. Such as this Colgate ad below. In this ad, the statement “9 out of 10 dentists who tried would recommend it” was used. This statement influences perceived credibility because it says that dentists which are professionals that work on your teeth promoted, used, and approved this certain brand of toothpaste. Then at the bottom of the ad, there is a little comment showing where the brand got and received their information.

Not Credible Source: This ad below is an example of what happens if they are not backed by credible sources. This ad may make a statement about a dentist recommending but, there were studies showing quite the opposite. Everything that was presented in the ad expresses just pure feelings with no study information or actual information that would persuade an individual to go with this brand over another.

Attractive Source: This ad below is an example of an attractive source. The ad is presented Dwayne “The Rock” Johnson as a celebrity spokesman of service for the company Ford. For some individuals, this would persuade them to buy a Ford vehicle because a celebrity that they all know supports and trusts this brand. I personally find this ad effective because it accomplishes exactly what the ad-makers goals were.