Taylor & Francis and Google Scholar™
As publishers of scholarly information, we work with Google Scholar (http://scholar.google.com/) to index peer-reviewed papers, theses, preprints, abstracts, and technical reports from all disciplines of research and make them searchable via Google Scholar.
Multiple versions of a work are grouped to improve its ranking. In many research areas versions of a work may appear as preprints and conference papers before being published as a journal article. These preliminary versions of a work are often cited in addition to the authoritative journal version. The number of citations to a particular work is an important part of determining its rank in the Google Scholar search results. Grouping versions allows us to collect all citations to all versions of a work. In practice, this can significantly improve the position of an article in the search results.
Publishers' full-text, if indexed, is the primary version. When multiple versions of a work are indexed, Google Scholar selects the full and authoritative text from the publisher as the primary version - and Google notes "we can only do this if we are able to successfully identify, crawl and process the full text of the publisher's version".
Taylor & Francis has control over access to our articles. Google aims to preserve their control over access to their content and only cache articles and papers that are not access-controlled. Publishers can help by identifying which regions of their sites are access-controlled.
