IACC/OARC Autism Spectrum Disorder Publications Analysis: The Global Landscape of Autism Research, July 2012Skip Over Navigation Links Skip Over Navigation Links
- Executive Summary
- Chapter One: Trends in Autism Research Topics and Publications
- What research themes are prominent in autism publications?
- How were 2010 publications distributed across IACC Strategic Plan Critical Question areas?
- How much has autism research grown?
- Which Critical Question research areas are showing the strongest growth?
- Main findings from analysis of trends in autism research topics and publications
- Spotlight On Risk Factor Research
- Spotlight On Treatments And Interventions Research
- Chapter Two: Impact and Maturity Of The Autism Research Field
- Chapter Three: Global Autism Research Funders
- Chapter Four: Global Autism Publications and Collaborations
- Appendix I: Methodology for Identifying ASD-Related Research Publications and Supplemental Primary Research Publication Counts
- Appendix II: Automated Categorization of ASD Publications (1980-2009)
- Appendix III: Web of Science® Journal Subject Categories
- Appendix IV: Web of Science® Citation Data
- Appendix V: Full Funder List for 2010 ASD Publications
- Appendix VI: Country Co-Authorship Pairs in 2010 ASD Publications
- Appendix VII: 2010 ASD Publication Counts by Country
- Appendix VIII: Methodology for Calculating World Share of Autism Research Publications
- List of Figures
- Figure 1. The Seven IACC Strategic Plan Critical Questions and Corresponding Research Areas
- Figure 2. Autism Research Pipeline
- Figure 3. Research Methods Used in the ASD Research Publications Analysis
- Figure 4. Main Questions Addressed in the ASD Research Publications Analysis Report
- Figure 5. Autism Publications Word Cloud
- Figure 6. Distribution of 2010 Primary Research Publications within the Seven Critical Question Areas of the IACC Strategic Plan
- Figure 7. Growth in ASD-Related Publications, 1980 to 2010
- Figure 8. Growth in ASD Research Publications by Critical Question Area within the IACC Strategic Plan, 1981 to 2010
- Figure 9. Number and Fold Growth of ASD Publications from 2000 to 2010
- Figure 10. Publication Output and Trends in Subcategories of Autism Risk Factor Research
- Figure 11. Publication Output and Trends in Subcategories of Autism Treatments and Interventions Research
- Figure 12. Autism Research Citation Rate from 1980 to 2009
- Figure 13. Impact of Autism Publications Compared to Average Citation Rates in Related Publications, 1995 to 2009
- Figure 14. Proportion of Highly Cited Autism Publications from 1995 to 2009
- Figure 15. Types of US and non-US Funders Acknowledged in 2010 Autism Publications
- Figure 16. Overlap Between Different Types of Funders Acknowledged in 2010 Autism Publications
- Figure 17. Patterns of Strategic Research Emphasis by Type of Funder in 2010 Autism Publications
- Figure 18. Extent of Global Autism Research and International Collaborations in 2010
- Figure 19. Global Growth in Autism Publications by Country, 1980 to 2010
- Figure 20. Author Countries for ASD-Related Publications as a Share of the World Total, 1980 to 2010
- Figure 21. International Autism Publication Collaboration Networks in 1990, 1995, 2000, 2005, and 2010
- Figure 22. Extent of International Collaboration in Autism Research, 1980 to 2010
- Figure 23. Impact of Collaborative International Autism Publications, 1995 to 2009
- Figure 24. Impact of Collaborative Publications with Authors from Multiple Institutions, 2000 to 2010
- Figure 25. State by State Number of US Autism Publications in 2010
- Figure 26. Extent of Institutional and International Collaboration in US Autism Research, 1980 to 2010
- Figure A-27. Growth in ASD Primary Research Publications by Critical Question Area, 1981 to 2010
- Figure A-28. Number and Fold Growth of ASD Primary Research Publications from 2000 to 2010
- Figure A-29. Primary Research Publication Output and Trends in Subcategories of Autism Risk Factor Research
- Figure A-30. Primary Research Publication Output and Trends in Subcategories of Autism Treatments and Interventions Research
- List of Tables
- Table 1. 2010 Funders Acknowledged on 10 or More Publications
- Table 2. Top 25 Countries Publishing Autism Research in 2010
- Table 3. Top 25 Institutions Publishing Autism Research Globally in 2010
- Table A-4. Web of Science® and MEDLINE Article Types Classified as Secondary Articles
- Table A-5. Journals in which All Publications Were Classified as Secondary Research
- Table A-6. Comparison Group: Journal Subject Categories Comprising 75% of ASD Publications Since 1980
Chapter Three: Global Autism Research Funders
The 2010 IACC Autism Spectrum Disorder Research Portfolio Analysis Report tracks US public and private autism research funding, or inputs, as shown in Figure 2.19 This chapter of the ASD Publications Analysis complements the IACC Portfolio Analysis by providing an examination of the publication activity of US and non-US funders to determine which have made significant contributions to published research, or research outputs. Acknowledged funders were identified to reveal prominent funding bodies in the autism research arena. These funding bodies were classified as either governmental or private, and the extent to which publications cited multiple sources of funding was assessed.
Who funded autism research in 2010?
To identify the organizations that sponsor autism research, the text from the funding acknowledgments sections of research publications was obtained for each publication, as available. This was achieved using a variety of strategies. The Web of Science® database includes the complete funding acknowledgment paragraphs for articles published since 2008, and MEDLINE has collected these data for publications acknowledging US NIH funding. A list of known funding organization names and aliases was also used to search the acknowledgment sections to increase the number of funders identified.
While the funding acknowledgment data in these databases are informative, it is important to understand its limitations. Different countries may have different philosophies or guidelines that influence how or when researchers acknowledge funding sources, which may result in fewer acknowledgments in some publications. Journals also have varied policies regarding the formatting and information included in the acknowledgment sections, which may affect the results of automated searches for acknowledgment data. Researchers may also simply overlook the need to acknowledge one or all of their funding sources. Despite these limitations, the funding acknowledgment data collected serve as a valuable resource for analyzing the support for many of the 2010 autism publications.
Among the 2,477 autism research articles published in 2010, 870 (36%) acknowledged a funding source. This percentage is somewhat lower than that determined in a similar analysis, which reported an average funding acknowledgment rate of 43% in all 2009 research publications indexed within Web of Science®.20 Among the 2010 autism publications, the most acknowledged funder was the US National Institutes of Health (NIH) (Table 1). NIH may receive more funding acknowledgments compared to other funders, not only because it may support more publications than other funders due to the size of its investment in autism research, but also because of the agency's requirement that grant recipients acknowledge support in all resulting research publications.v While it is likely that the overall number of publications attributed to specific funders is underreported, there is a large enough sample of acknowledged funders among the 2010 autism publications to obtain informative details about funders and their activities. Once identified, funders were manually assigned to the following five categories:vi
- Private, including non-profit and for-profit organizations
- Public-Private Partnership
Funders were also defined by their country of origin. The complete list of acknowledged funders, categorized by funder type (e.g., Government, Private, etc.) and home country is provided in Appendix V.
2010 Funders Acknowledged on 10 or More Publications
|Rank||Funding Organization||Country||Funder Type||Publications with acknowledgment|
|1||National Institutes of Health||United States||Government||437|
|2||Autism Speaks||United States||Private||119|
|3||The Medical Research Council||United Kingdom||Government||59|
|5||Wellcome Trust||United Kingdom||Private||36|
|6||The Canadian Institutes of Health Research||Canada||Government||35|
|7||Simons Foundation||United States||Private||27|
|8||National Science Foundation||United States||Government||26|
|9||Ministry of Education, Science, Sport and Culture||Japan||Government||25|
|10||Brain and Behavior Research Foundation/NARSAD||United States||Private||24|
|11||Japan Society for the Promotion of Science||Japan||Government||18|
|12||German Research Foundation (DFG)||Germany||Government||17|
|13||Netherlands Organization for Scientific Research (NWO)||Netherlands||Government||15|
|14||Natural Sciences and Engineering Research Council||Canada||Government||14|
|15||National Institute for Health and Medical Research||France||Government||13|
|15||Ministry of Education, University and Research||Italy||Government||13|
|17||Howard Hughes Medical Institute||United States||Private||12|
|17||Nancy Lurie Marks Family Foundation||United States||Private||12|
|19||Centers for Disease Control and Prevention||United States||Government||12|
|19||Federal Ministry of Education and Research||Germany||Government||12|
|19||FRAXA Research Foundation||United States||Private||12|
|23||Health Research Board||Ireland||Government||11|
|23||National Institute for Health Research||United Kingdom||Government||11|
|23||Ministry of Health||Italy||Government||11|
|23||The National Health and Medical Research Council||Australia||Government||11|
|27||National Science Council||Taiwan||Government||10|
|27||Swedish Research Council||Sweden||Government||10|
|27||Ministry of Health, Labour and Welfare||Japan||Government||10|
|27||Economic and Social Research Council||United Kingdom||Government||10|
Table 1. 2010 Funders Acknowledged on 10 or More Publications. Funders are listed along with their country of origin, their type, and the number of publications in which they are acknowledged. In cases where a single publication acknowledges multiple sources, the publication is counted for each source acknowledged.
More than 700 unique funders were represented among the 870 autism research articles published in 2010 for which funding acknowledgments could be collected. In many cases, more than one funder was acknowledged in a given article. Table 1 lists those funding organizations cited by 10 or more publications in the 2010 publication set. The most acknowledged funders were from the United States – the NIH, a Federal funding agency, with 437 acknowledgments, and Autism Speaks, a non-profit organization with 119 acknowledgments. The remaining organizations represent a mixture of non-US, governmental, and private funding organizations. Approximately two dozen of the private funding organizations were pharmaceutical companies, which received a combined 45 funding acknowledgments, representing only a small fraction of private funder acknowledgments (~5%).vii Pharmaceutical and other for-profit industries are less likely to support work that is published in peer-reviewed literature; therefore, funding acknowledgment data for these groups are limited.
Overall, the acknowledgments data indicate that ASD research was supported by a wide array of US government agencies and private foundations as well as many non-US organizations, both government and private. Figure 15 shows the distribution of funder types across all of the 2,271 funding acknowledgments in the 2010 publication set as well as the number of US and non-US funding organizations within each category. While it is not too surprising that government funding agencies were most frequently acknowledged for providing funding support, since government agencies tend to provide a large proportion of overall research funding related to health conditions and may also have strong funding acknowledgment policies, it was of interest to find that private funders were cited nearly as often. This may suggest that private funders also have strong funding acknowledgment policies or are effective in following up with funded researchers to ensure acknowledgment.
Types of US and non-US Funders Acknowledged
in 2010 Autism Publications
Figure 15. Types of US and non-US Funders Acknowledged in 2010 Autism Publications. The number of funding acknowledgments is displayed by type, including Government, Private (non-profit and for-profit), University, Hospital, or Public/Private Partnership, and by their country of origin (the number of US funder acknowledgments in blue and non-US funder acknowledgments in orange). In cases where a single publication acknowledges multiple sources, each source is counted individually. Within the 870 publications with funding acknowledgment data, the total number of individual funding acknowledgments was 2,271.
Funding acknowledgments were split almost evenly between US and international funders, with US-based funders representing 51% percent of all acknowledgments (1,168 of 2,271) and being acknowledged by 64% of all publications that cited funding (560 of 870). As indicated in Table 1 and Appendix V, funding organizations from Canada, Europe, Australia, and Asia also account for substantial funding acknowledgments.
What is the extent of overlap between funding sources?
With numerous governmental and private organizations funding autism research, investigators often secure multiple sources of funding to increase their budgetary resources to support their work. To better understand these sources and extent of overlap between multiple funder types supporting the same research, the funding acknowledgments sections of autism-related journals were analyzed. Figure 16 shows the distribution of the 2010 publication funding acknowledgments among US government, US private, and non-US funding organizations as well as the number of publications shared between two (~20% of all publications) or all three funder types (~13% of all publications).ix More than 30% of the publications (282 of 870) acknowledged funding from a combination of non-US, US government, and/or private sources. These areas of intersection suggest considerable multinational and collaborative efforts related to autism research.
Overlap Between Different Types of Funders Acknowledged
in 2010 Autism Publications
Figure 16. Overlap Between Different Types of Funders Acknowledged in 2010 Autism Publications. This Venn diagram represents all 2010 ASD publications that acknowledged or cited at least one funding source. The type of funding source was manually categorized into one of three groups: 1) Non-US funders (cited in 439 publications), 2) US government funders (cited in 509 publications), and 3) US private funders (cited in 302 publications).viii Areas of overlap in the diagram indicate publications that cited two or all three of the funder types. For example, in US government cited papers, 236 only cited a US government funding source, 19 publications cited the US government plus a non-US funder, 148 publications cited US government plus a US private funder, and 106 cited all three funding sources.
Do different funder types support different areas of autism research?
The Critical Question categorization scheme for publications was used to investigate whether different funder types supported different aspects of autism research. The number of publications linked to each funder type was determined, and publications were then further sorted into one of the seven Critical Question areas identified in the IACC Strategic Plan for ASD Research. Figure 17 compares the degree to which various funder types support studies in the different Critical Question research areas. The predominant pattern is similar for US government funders, US private funders, and non-US fundersx of autism research.
Patterns of Strategic Research Emphasis by Type of Funder
in 2010 Autism Publications
Figure 17. Patterns of Strategic Research Emphasis by Type of Funder in 2010 Autism Publications. This graph plots the distribution of publications by Critical Question category for all 2010 publications (purple) and the type of funding those publications received, including US government (blue), US private (green), Non-US funders (orange), US government plus Non-US (pink), and publications that did not cite a funding source (gold). The patterns show that publications that received funding from both a US government and a non-US source were relatively more likely to be related to Risk Factors than the other funder types, and publications that did not acknowledge a funding source at all were more likely to fall into the categories of Treatments and Interventions, Services, and Lifespan Issues research. For figure clarity, Infrastructure and Surveillance publications are not included in this graph because the proportion of Infrastructure and Surveillance publications in all groups studied was very low.
The distribution of publications is skewed toward the basic Biology of ASD for all of these funder types, followed in order by research on Risk Factors, Treatments and Interventions, and Diagnosis. There were two deviations from this pattern. First, publications supported by international funding in the form of US government plus a non-US funding source show a somewhat higher proportion of publications in the area of Risk Factors. With few exceptions, publications with international funding also had international co-authors (described later in this report as "international collaboration"). The specific Risk Factor research publications were examined in detail and we found many to be large-scale gene discovery studies collaboratively co-authored by North American and European investigators. A second distinctive pattern of Critical Question distribution was observed in publications that did not acknowledge a funding source. A heavier concentration of these publications was associated with research in the Treatments and Interventions, Services, and Lifespan Issues Critical Question areas.
As noted above, the funding acknowledgment rate of 36% observed for 2010 publications was lower than the overall rate of 43% reported across all publications in Web of Science®.21 That same study also showed that funding acknowledgment rates in research publications can vary greatly across different research disciplines with the highest rates of funding acknowledgment – between 55% and 68% – found among publications in the natural sciences (e.g., molecular biology, chemistry, and biological sciences). In contrast, lower rates were observed in clinical medicine (32%), psychology and behavioral science (27%), and social sciences (<10%). These trends are similar to those seen among ASD publication funding acknowledgments. Specifically, in this 2010 autism publications set, articles published in education and social science fields had lower rates of funding acknowledgments than other areas. Even within the Biology and Risk Factor Critical Question areas, which had the highest rate of funding acknowledgment at 50% and 60%, respectively, a sizeable portion of the 2010 autism publications did not cite a funding source. While it is possible that research in these areas is being undertaken without formal funding support, a more likely explanation is that researchers are not acknowledging their funding sources, perhaps due to the culture of those fields or to absence of policies to require or encourage funder acknowledgment.
The absence of funding acknowledgments makes it difficult for funders to track and report progress on their investments, in turn making it more challenging for funders to demonstrate return on investment to taxpayers, donors, and investors. As productivity is often used to evaluate the effectiveness of research funding and to provide a rationale for continuing or augmenting funding levels, the inability to attribute research results to a specific funding source for such a large proportion of research publications presents potential loss of opportunities to communicate research progress and stimulate research in the autism field. Given this risk, improving the rate of acknowledgment of funding sources both in the US and internationally is an important issue that needs to be addressed to help ensure continued support and growth of the autism research field.
Although funding acknowledgment data provide a snapshot of international funding and research activity, these data have their limitations, as discussed previously. Non-US funders account for approximately half of all funders acknowledged for supporting 2010 autism research publications, suggesting that global research activity in autism is extensive. For a more comprehensive and accurate account of where autism research is taking place, author address information from the Web of Science® database was used to track global autism research publications and collaborations, which will be discussed in the next chapter.
Main findings from analysis of global autism research funders:
- 2010 ASD publications contained 2,271 funding acknowledgments to more than 700 different funders, including many government agencies and nearly as many private organizations.
- Approximately one-third of publications with funding acknowledgment data cited some combination of US government, US private, and international funding support.
- Absence of comprehensive funding acknowledgments in approximately two-thirds of ASD research publications makes it difficult for funders to track and report research progress.
- Inability of funders to comprehensively track research publications stemming from their investments may result in lost opportunities to communicate progress resulting from these investments and grow the autism field.
- Given potential risks and lost opportunities arising from a large proportion of research not providing funding acknowledgment, policymakers, funders, publishers, and institutions should encourage the research community to acknowledge research funders to ensure continued investment in ASD research.
All material appearing in this report is in the public domain and may be reproduced, copied, or used in presentations and publications. A suggested citation follows.
Office of Autism Research Coordination (OARC), National Institute of Mental Health and Thomson Reuters, Inc. on behalf of the Interagency Autism Coordinating Committee (IACC). IACC/OARC Autism Spectrum Disorder Research Publications Analysis Report: The Global Landscape of Autism Research. July 2012. Retrieved from the Department of Health and Human Services Interagency Autism Coordinating Committee website: http://iacc.hhs.gov/publications-analysis/july2012/index.shtml