Answer:
The author's purpose for including Ecker's study was to support his claim that headlines matter and change the perspective of readers.
Explanation:
"How Headlines Change The Way We Think" is an article written by Maria Konnikova. The article talks about how headlines change the perspective of readers.
In this article, the author includes Ullrich Ecker's study. As per the study, Ecker suggests that a slight change in the words in headlines does make a difference in the reader's perspective. In his studies, the factual article (which was misleading), hurt the reader's ability to recall detail's from the article.
Therefore, the purpose was to support the author's claim, with facts, that how headlines change the reader's perspective.