|Producer||ProQuest (United States)|
|History||1938 to present|
|Record depth||Index & abstract|
|Temporal coverage||1861 to present|
Dissertation Abstracts International
Dissertation Abstracts, Dissertation Abstracts International (DAI) or the ProQuest Dissertations and Theses (PQDT) database is a bibliography of American (and international) dissertations published since 1938 by University Microfilms International (UMI) / ProQuest, Ann Arbor. UMI has had an agitated life and the bibliographical data have often shifted owner and name, and therefore appears under different labels. It covers doctoral dissertations accepted at accredited American institutions since 1861. Selected Masters theses have been included since 1962; since 1988, the database includes citations for dissertations from 50 British universities that are available at The British Document Supply Centre. Additionally, it covers a limited number of dissertations from the rest of the world.
The print version is published monthly and cumulated annually and it is available both in softcover and on microfiche. It is divided in three sections:
- Section A, Humanities and Social Sciences (ISSN 0419-4209)
- Section B, Sciences and Engineering (ISSN 0419-4217)
- Section C (DAI-C),(formerly European Dissertations) (ISSN 1042-7279) covers non-North American materials, most of them unavailable for purchase from ProQuest. As of 2008, ProQuest no longer offers DAI-C as a separate product.
Form or content
The usability of dissertation abstracts depends largely on their content. Many journals within the medical community have settled on a seven sentence structure, which is also gaining acceptance in the social sciences, education and business. In it, the purpose of the study and methodological choices are outlined succinctly, allowing the reader or researcher to quickly scan and evaluate a number of studies to easily choose ones that meet their particular demands. The structure contains variations on the following seven sentence stems: "The purpose of this study is...." "The scope of this study...." "The methodology...." "The Findings..." "Conclusions reached are ..." "Limitations of this study include...." "This study contributes...." Abstracts of dissertation proposals contain the same seven concepts, substituting data collection and analysis in place of findings and conclusions. Abstracts are limited in the United States by the UMI to 350 words.
In 1962, the Xerox Corporation bought UMI. Xerox introduced some changes and in 1971 UMI changed its name to Xerox University Microfilms, but in 1976 reverted to University Microfilms International. In 1985, UMI was sold to Bell & Howell, who changed the name to Bell & Howell Information and Learning in 1999. In 2001 Bell and Howell created the ProQuest Company. December 2006, the Cambridge Information Group (CIG) bought the unit of ProQuest called ProQuest Information and Learning (which included UMI).
Former titles and print titles: From 1969: Dissertations Abstract International; from 1951: Dissertations Abstracts; from Microfilm Abstracts (an annual catalog of the dissertations available for sale from UMI), American Doctoral Dissertations (ADD), (until 1964): Index to American Doctoral Dissertations, (until 1956): Doctoral Dissertations Accepted by American Universities. Masters Abstracts International (MAI).
There are different versions in print and online. The online version is Dissertation Abstracts Online while the print bibliography is termed Dissertation Abstracts International. Material except the abstracts themselves were issued also on CD-ROM under the title: Dissertation abstracts ondisc.
- 1997: Dissertations go digital with ProQuest Digital Dissertations
- 1998: Library of Congress recognizes UMI as offsite repository of Digital Dissertations Library
- Davinson, D. (1977). Theses and Dissertations as Information Sources. London: Clive Bingley.
- Glatthorn, A. A. & Joyner, R. L. (2005). Writing the Winning Thesis or Dissertation: A Step by Step Guide. Thousand Oaks, Corwin Press.
Complete Your Collection
Dissertations and theses complete your library collection by surfacing original research that can often be the only source of information on a given topic.
Simplify Searching with a Single Unified Access Point for Dissertations and Theses
Comprehensive historic and ongoing coverage from universities ensures effective, efficient results.
Significant and Growing International Coverage
Content partners for PQDT Global include University College London, London School of Economics and Political Science, University of Cardiff, University of Leicester, University of Aberdeen, University of Bath and University of Valencia.
Offer Critical Support for Arts, Humanities, and Social Sciences
In disciplines where journals are not the primary form of scholarly communication, dissertations offer access to significant primary research that is not published in any other format and they surface seminal ideas from notable scholars.
Enhance Research in the Sciences
Dissertations provide additional context for research published in journals or conference proceedings while surfacing hard to find information such as negative results.
Add a New Dimension to Literature Reviews
Dissertations are an important and valuable tool for literature reviews, with deep coverage and extensive bibliographies that surface sources and ideas that would otherwise be missed.
Expose Research in Depth
Audio, video, data, survey instruments, and other types of digital files are included for thousands of works.
Reduce Library ILL Costs
Reduce resources and costs to gain access to dissertations and theses.