There are two options for the sort order of the search results: Most Recent First and Relevance.
Sorting by Most Recent First presents results in reverse chronological order by publication date.
Sorting by Relevance presents the most relevant results first. The relevance is determined using the first eight terms in the descriptor field. The records containing the search term within the descriptor field will be listed first.
The sort order may be changed by using the pull-down menu on the search results page below the publication type tabs.