The DOI matches its Crossref record; 35 of the 35 references it cites were found in a registry or an index.
The Immensely Inflated News Audience: Assessing Bias in Self-Reported News Exposure
Abstract
Many studies of media effects use self-reported news expo- sure as their key independent variable without establishing its validity. Motivated by anecdotal evidence that people's reports of their own me- dia use can differ considerably from independent assessments, this study examines systematically the accuracy of survey-based self-reports of news exposure. I compare survey estimates to Nielsen estimates, which do not rely on self-reports. Results show severe overreporting of news exposure. Survey estimates of network news exposure follow trends in Nielsen ratings relatively well, but exaggerate exposure by a factor of 3 on average and as much as eightfold for some demographics. It follows that apparent media effects may arise not because of differences in ex- posure, but because of unknown differences in the accuracy of reporting exposure.
Overview
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
In the citing paper
“Without access to behavioural measures of exposure, studies must instead rely on survey self-reports that are prone to measurement error24,25.”
From Like-minded sources on Facebook are prevalent but not polarizing (2023) · cites this paper as [24]
Citations
Cites
The Nature and Origins of Mass Opinion
Zaller, J. R. (1992) · doi:10.1017/cbo9780511818691 · Cited by 7,785
The Nature and Origins of Mass Opinion.
Kenski, H. C., & Zaller, J. R. (1993) · Contemporary Sociology A Journal of Reviews · doi:10.2307/2074664 · Cited by 5,150
The Psychology of Survey Response
Tourangeau, R., Rips, L. J., & Rasinski, K. (2000) · doi:10.1017/cbo9780511819322 · Cited by 4,734
Self-reports: How the questions shape the answers.
Schwarz, N. (1999) · American Psychologist · doi:10.1037/0003-066x.54.2.93 · Cited by 2,846
Prior, M. (2007) · Cambridge University Press eBooks · doi:10.1017/cbo9781139878425 · Cited by 1,646
Self-citation(2007) · Choice Reviews Online · doi:10.5860/choice.45-1733 · Cited by 1,181
Sudman, S., Juster, F. T., & Stafford, F. P. (1987) · Journal of the American Statistical Association · doi:10.2307/2289193 · Cited by 872
Messages Received: The Political Impact of Media Exposure
Bartels, L. M. (1993) · American Political Science Review · doi:10.2307/2939040 · Cited by 735
Asking Questions About Behavior: Cognition, Communication, and Questionnaire Construction
Schwarz, N., & Oyserman, D. (2001) · American Journal of Evaluation · doi:10.1177/109821400102200202 · Cited by 715
Who Gets the News? Alternative Measures of News Reception and Their Implications for Research
Price, V., & Zaller, J. R. (1993) · Public Opinion Quarterly · doi:10.1086/269363 · Cited by 703
Research works printed but not linked: 6
- Bechtel, 1972, Correlates between Observed Behavior and Questionnaire Responses in Television Viewing, 274
- Brady, 1986, The Perils of Survey Research: Inter-Personally Incomparable Responses, Political Methodology, 11, 269
- Papper, 2004, Middletown Media Studies: Media Multitasking and How Much People Really Use the Media, International Digital Media and Arts Association Journal, 1, 9
- Robinson, 1985, The Validity and Reliability of Diaries versus Alternative Time Use Measures, 33
- Romer, 2004, Capturing Campaign Dynamics
- Zaller, 1996, Analysis of News Exposure Items from the 1995 Pilot
Cited by
Sorted by citations
Items 201–300 of 562
Link, E., Baumann, E., & Leuppert, R. (2023) · Health Communication · doi:10.1080/10410236.2023.2201736 · Cited by 24
Bode, L., Vraga, E. K., & Tang, R. (2023) · Current Opinion in Psychology · doi:10.1016/j.copsyc.2023.101786 · Cited by 23
Espeland, E. (2024) · Journalism Studies · doi:10.1080/1461670x.2024.2366338 · Cited by 23
Azrout, R., van Spanje, J., & de Vreese, C. H. (2012) · Acta Politica · doi:10.1057/ap.2012.20 · Cited by 23
Andersen, K. V. (2019) · Mass Communication & Society · doi:10.1080/15205436.2019.1585544 · Cited by 22
Hyperpartisan News Use: Relationships with Partisanship and Cognitive and Affective Involvement
Peacock, C., Hoewe, J., Panek, E. T., & Willis, G. (2020) · Mass Communication & Society · doi:10.1080/15205436.2020.1844902 · Cited by 26
Colston, D. C., Xie, Y., Thrasher, J. F., Patrick, M. E., Titus, A. R., Emery, S., McLeod, M. C., Elliott, M. R., & Fleischer, N. L. (2021) · Nicotine & Tobacco Research · doi:10.1093/ntr/ntab226 · Cited by 22
Wojcieszak, M., von Hohenberg, B. C., Casas, A., Menchen-Trevino, E., de Leeuw, S., Gonçalves, A., & Boon, M. (2022) · Humanities and Social Sciences Communications · doi:10.1057/s41599-022-01423-x · Cited by 27
Kwak, N., Lane, D. S., Weeks, B. E., Kim, D. H., & Lee, S. S. (2020) · Social science computer review · doi:10.1177/0894439320920790 · Cited by 21
Reducing misinformation sharing at scale using digital accuracy prompt adsPreprint
Lin, H., Garro, H., Wernerfelt, N., Shore, J. C., Hughes, A., Deisenroth, D., Barr, N., Berinsky, A. J., Eckles, D., Pennycook, G., et al. (2024) · doi:10.31234/osf.io/u8anb · Cited by 25
Do News Actually “Find Me”? Using Digital Behavioral Data to Study the News-Finds-Me Phenomenon
Haim, M., Breuer, J., & Stier, S. (2021) · Social Media + Society · doi:10.1177/20563051211033820 · Cited by 21
Media Roles in the Online News Domain: Authorities and Emergent Audience Brokers
Majó-Vázquez, S., Cardenal, A. S., Segarra, O., & Colomer-de-Simón, P. (2020) · Media and Communication · doi:10.17645/mac.v8i2.2741 · Cited by 21
Anti-Smoking Media Campaigns and Disparities in Smoking Cessation in the United States, 2001-2015
Colston, D. C., Cho, B., Thrasher, J. F., Titus, A. R., Xie, Y., Emery, S., Elliott, M. R., & Fleischer, N. L. (2021) · American Journal of Health Promotion · doi:10.1177/0890117120985818 · Cited by 20
Measures of Political Talk Frequency: Assessing Reliability and Meaning
Morey, A. C., & Eveland, W. P. (2016) · Communication Methods and Measures · doi:10.1080/19312458.2015.1118448 · Cited by 21
The Effect of Newspaper Entry and Exit on Electoral Politics
Gentzkow, M. A., Shapiro, J. M., & Sinkinson, M. (2009) · National Bureau of Economic Research · doi:10.3386/w15544 · Cited by 20
What You Seek Is Who You Are: An Applied Spatial Model of Newspapers’ Ideological Slant
Curini, L. (2020) · The International Journal of Press/Politics · doi:10.1177/1940161220973174 · Cited by 19
Robinson, D. (2019) · Political Studies · doi:10.1177/0032321719848901 · Cited by 19
Presidential Campaigns and the Fundamentals Reconsidered
Enns, P. K., & Richman, B. (2013) · The Journal of Politics · doi:10.1017/s0022381613000522 · Cited by 18
Digital intermediaries in the UK: implications for news plurality
Tambini, D., & Labo, S. (2016) · Info · doi:10.1108/info-12-2015-0056 · Cited by 18
How Content Preferences Limit the Reach of Voting Aids
Mummolo, J., & Peterson, E. (2016) · American Politics Research · doi:10.1177/1532673x16674756 · Cited by 18
Kleppe, M., & Otte, M. (2017) · Digital Scholarship in the Humanities · doi:10.1093/llc/fqx030 · Cited by 18
Communities of online news exposure during the UK General Election 2015
Weaver, I. S., Williams, H. T. P., Cioroianu, I., Jasney, L., Coan, T., & BANDUCCI, S. A. (2019) · Online Social Networks and Media · doi:10.1016/j.osnem.2019.05.001 · Cited by 18
Hornik, R., Binns, S., Emery, S., Epstein, V. M., Jeong, M., Kim, K., Kim, Y., Kranzler, E. C., Jesch, E., Lee, S. J., et al. (2022) · Journal of Communication · doi:10.1093/joc/jqab052 · Cited by 18
Raising the Floor or Closing the Gap? How Media Choice and Media Content Impact Political Knowledge
Leeper, T. J. (2020) · Political Communication · doi:10.1080/10584609.2020.1753866 · Cited by 18
Television News Repertoires, Exposure Diversity, and Voting Behavior in the 2016 U.S. Election
Ksiazek, T. B., Kim, S. J., & Malthouse, E. C. (2019) · Journalism & Mass Communication Quarterly · doi:10.1177/1077699018815892 · Cited by 17
Lee, T., Johnson, T. J., & Wilkerson, H. S. (2022) · Mass Communication & Society · doi:10.1080/15205436.2022.2026401 · Cited by 16
The intermediate time of news consumption
Keightley, E., & Downey, J. (2017) · Journalism · doi:10.1177/1464884916689155 · Cited by 17
Do People Consume the News they Trust?
Taneja, H., & Yaeger, K. (2019) · CHI Conference on Human Factors in Computing Systems · doi:10.1145/3290605.3300770 · Cited by 17
Crisis, Credibility, and the Press: A Priming Model of News Evaluation
Bucy, E. P., D’Angelo, P., & Bauer, N. M. (2014) · The International Journal of Press/Politics · doi:10.1177/1940161214541682 · Cited by 17
From Filled to Empty Time Intervals: Quantifying Online Behaviors with Digital Traces
Peng, T., Zhou, Y., & Zhu, J. J. H. (2020) · Communication Methods and Measures · doi:10.1080/19312458.2020.1812556 · Cited by 17
A Balancing Act: How Media Professionals Perceive the Implementation of News Recommender Systems
Blassnig, S., Strikovic, E., Mitova, E., Urman, A., Hannák, A., de Vreese, C. H., & Esser, F. (2024) · Digital Journalism · doi:10.1080/21670811.2023.2293933 · Cited by 33
Olsen, R. K. (2019) · Digital Journalism · doi:10.1080/21670811.2019.1679029 · Cited by 16
Battle of the classes: news consumption inequalities and symbolic boundary work
Lindell, J. (2020) · Critical Studies in Media Communication · doi:10.1080/15295036.2020.1829670 · Cited by 16
Partisan Selective Exposure in TV Consumption Patterns: A Polarized Developing Country Context
Bou-Hamad, I., & Yehya, N. A. (2016) · Communication Research · doi:10.1177/0093650216681896 · Cited by 17
Bias and Trust in Authoritarian MediaPreprint
Truex, R. (2016) · SSRN Electronic Journal · doi:10.2139/ssrn.2802841 · Cited by 18
Fayne, M. W., & Edgerly, S. (2025) · Mass Communication & Society · doi:10.1080/15205436.2025.2578807 · Cited by 15
How weather experiences strengthen climate opinions in Europe
Damsbo-Svendsen, S. (2020) · West European Politics · doi:10.1080/01402382.2020.1792731 · Cited by 15
Joris, G., Vercoutere, S., Clercq, O. D., Damme, K. V., Mechant, P., & Marez, L. D. (2022) · Digital Journalism · doi:10.1080/21670811.2022.2106445 · Cited by 19
Tkaczyk, M., Tancoš, M., Šmahel, D., Elavsky, S., & Plhák, J. (2024) · Computers in Human Behavior · doi:10.1016/j.chb.2024.108281 · Cited by 19
Confusing Effects of Fake News on Clarity of Political Information in the Social Media Environment
Choi, J., & Lee, J. K. (2021) · Journalism Practice · doi:10.1080/17512786.2021.1903971 · Cited by 15
News Media Consumption and Political Behavior in Latin America
Salzman, R. (2015) · Journal of Politics in Latin America · doi:10.1177/1866802x1500700203 · Cited by 15
The impact of projection and backboning on network topologies
Coscia, M., & Rossi, L. (2019) · IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining (ASONAM) · doi:10.1145/3341161.3342862 · Cited by 16
A Balanced News Diet, Not Selective Exposure: Evidence from a Direct Measure of Media ExposurePreprint
LaCour, M. J. (2012) · SSRN Electronic Journal · doi:10.2139/ssrn.2110621 · Cited by 15
Garzia, D. (2017) · SSRN Electronic Journal · doi:10.2139/ssrn.2915482 · Cited by 15
In different worlds: The contributions of polarization and platforms to partisan (mis)perceptions
Overgaard, C. S. B., & Collier, J. R. (2023) · New Media & Society · doi:10.1177/14614448231176551 · Cited by 14
Choi, D.-H., & Noh, G.-Y. (2023) · SAGE Open · doi:10.1177/21582440231184969 · Cited by 16
Mindful Self-Compassion as an Antidote to Burnout for Mental Health Practitioners
Lyon, T. R., & Galbraith, A. (2023) · Healthcare · doi:10.3390/healthcare11202715 · Cited by 20
Hölig, S. (2016) · European Journal of Communication · doi:10.1177/0267323116647237 · Cited by 14
Using Cognitive Mapping to Study the Relationship between News Exposure and Cognitive Complexity
Boukes, M., Esch, F. A. W. J. V., Snellens, J., Steenman, S. C., & Vliegenthart, R. (2020) · Public Opinion Quarterly · doi:10.1093/poq/nfaa040 · Cited by 14
Student time choices and success
Marshall, S. J. (2018) · Higher Education Research & Development · doi:10.1080/07294360.2018.1462304 · Cited by 18
Partisan selective exposure in news consumption
Lumeau, M. (2022) · HAL · Cited by 17
Andersen, K., & Strömbäck, J. (2021) · International journal of communication · Cited by 13
Neihouser, M., Sandri, G., von Nostitz, F., & Haute, T. (2022) · French Politics · doi:10.1057/s41253-022-00173-1 · Cited by 13
News and Democratic Citizens in the Mobile Era
Dunaway, J., & Searles, K. (2022) · doi:10.1093/oso/9780190922504.001.0001 · Cited by 13
Tewksbury, D. H., Althaus, S. L., & Hibbing, M. V. (2011) · Communication Methods and Measures · doi:10.1080/19312458.2011.624650 · Cited by 13
Kim, S. J., Viswanathan, V., & Lee, H. M. (2020) · Journal of Broadcasting & Electronic Media · doi:10.1080/08838151.2020.1718986 · Cited by 13
Breuer, J., Baghal, T. A., Sloan, L., Bishop, L., Kondyli, D., & Linardis, A. (2021) · IASSIST Quarterly · doi:10.29173/iq988 · Cited by 13
Hölig, S., Hasebrink, U., & Behre, J. (2021) · New Media & Society · doi:10.1177/14614448211015982 · Cited by 13
Processing Culture: Cognition, Ontology, and the News Media1
Ostertag, S. F. (2010) · Sociological Forum · doi:10.1111/j.1573-7861.2010.01214.x · Cited by 13
The Polarized News Audience? A Longitudinal Study of News-Seekers and News-Avoiders in EuropePreprint
Elvestad, E., Blekesaune, A., & Aalberg, T. (2014) · SSRN Electronic Journal · doi:10.2139/ssrn.2469713 · Cited by 13
Colston, D. C., Xie, Y., Thrasher, J. F., Emery, S., Patrick, M. E., Titus, A. R., Elliott, M. R., & Fleischer, N. L. (2021) · International Journal of Environmental Research and Public Health · doi:10.3390/ijerph18157803 · Cited by 12
Slocum, E. M., Xie, Y., Colston, D. C., Emery, S., Patrick, M. E., Thrasher, J. F., Elliott, M. R., & Fleischer, N. L. (2022) · Nicotine & Tobacco Research · doi:10.1093/ntr/ntac152 · Cited by 12
Dimensionality of TV-news Exposure: Mapping News Viewing Behavior with People-Meter Data
Wonneberger, A., Schönbach, K., & van Meurs, L. (2012) · International Journal of Public Opinion Research · doi:10.1093/ijpor/eds004 · Cited by 12
Tian, Y., Zhang, X., Yamamoto, M., & Morey, A. C. (2020) · Journal of Information Technology & Politics · doi:10.1080/19331681.2020.1715908 · Cited by 12
‘To them that hath…’. News media and knowledge gaps
Norris, P. (2012) · Zeitschrift für Vergleichende Politikwissenschaft · doi:10.1007/s12286-012-0130-9 · Cited by 12
Holbert, R. L., Zeng, C., & Robinson, N. W. (2016) · Mass Communication & Society · doi:10.1080/15205436.2016.1274764 · Cited by 12
Nagler, R. H. (2017) · The International Encyclopedia of Communication Research Methods · doi:10.1002/9781118901731.iecrm0144 · Cited by 12
Andersen, K., Skovsgaard, M., & Pedersen, R. T. (2019) · European Journal of Communication · doi:10.1177/0267323119874623 · Cited by 11
Assessing media literacy competences: Reflections and recommendations from a quantitative study
Pereira, S., & Moura, P. (2022) · Journal of Media Literacy Education · doi:10.23860/jmle-2022-14-3-7 · Cited by 11
Young People and News: A Systematic Literature Review
Røsok-Dahl, H., & Ihlebæk, K. A. (2024) · Journalism Studies · doi:10.1080/1461670x.2024.2372425 · Cited by 20
Kim, S. J., & Webster, J. G. (2012) · International journal of communication · Cited by 11
The occidental otaku: Portuguese audience motivations for viewing anime
Gonçalves, J., Navio, C., & Moura, P. (2020) · Convergence The International Journal of Research into New Media Technologies · doi:10.1177/1354856520923966 · Cited by 11
The (null) over-time effects of exposure to local news websites: Evidence from trace data
Cronin, J., von Hohenberg, B. C., Gonçalves, J., Menchen-Trevino, E., & Wojcieszak, M. (2022) · Journal of Information Technology & Politics · doi:10.1080/19331681.2022.2123878 · Cited by 13
Selective Exposure and Hostile Media Perceptions During Election Campaigns
Bachl, M. (2016) · International Journal of Public Opinion Research · doi:10.1093/ijpor/edw014 · Cited by 11
Kösters, R., & Jandura, O. (2019) · Javnost - The Public · doi:10.1080/13183222.2018.1554845 · Cited by 11
Is Social Media Use Socially Enhancing or Compensating?
Gadekar, R., & Ang, P. H. (2020) · Journal of Creative Communications · doi:10.1177/0973258620943705 · Cited by 18
Thurman, N. (2020) · Convergence The International Journal of Research into New Media Technologies · doi:10.1177/1354856520967773 · Cited by 11
Computational strategic communication in a data-driven world
Zhou, A. Y., & van der Meer, T. G. L. A. (2024) · Public Relations Review · doi:10.1016/j.pubrev.2024.102496 · Cited by 11
Brems, M. K. (2024) · The International Journal of Press/Politics · doi:10.1177/19401612241301647 · Cited by 10
Rasul, M. E., Calabrese, C., Oh, Y. J., Cho, H. J., Jeon, M., & Boukes, M. (2025) · Journalism & Mass Communication Quarterly · doi:10.1177/10776990251373085 · Cited by 11
Chatting about the unaccepted: Self-disclosure of unaccepted news exposure behaviour to a chatbot
Ischen, C., Butler, J., & Ohme, J. (2023) · Behaviour and Information Technology · doi:10.1080/0144929x.2023.2237605 · Cited by 14
Wallsten, K. J. (2013) · International Journal of E-Politics · doi:10.4018/jep.2013040101 · Cited by 10
News Hole: The Demise of Local Journalism and Political Engagement
Hayes, D., & Lawless, J. L. (2021) · Cited by 10
Meirick, P. C. (2022) · Science Communication · doi:10.1177/10755470221119839 · Cited by 12
Explaining Citizens’ Participation in a Transnational European Public Sphere
Gerhards, J., & Hans, S. (2014) · Comparative Sociology · doi:10.1163/15691330-12341329 · Cited by 10
Lee, S., & Cho, J. (2023) · Computers in Human Behavior · doi:10.1016/j.chb.2023.107672 · Cited by 11
Reedy, J., Gastil, J., & Moy, P. (2015) · Political Communication · doi:10.1080/10584609.2014.969462 · Cited by 9
Exposure Measures and Content Analysis in Media Effects Studies
Jerit, J., & Barabas, J. (2011) · Oxford University Press eBooks · doi:10.1093/oxfordhb/9780199545636.003.0009 · Cited by 9
Brest, A., & Cordonier, L. (2023) · Mass Communication & Society · doi:10.1080/15205436.2023.2186246 · Cited by 10
Beattie, A., Kerr, J. R., & Arnold, R. (2024) · Kōtuitui New Zealand Journal of Social Sciences Online · doi:10.1080/1177083x.2024.2409663 · Cited by 8
Heseltine, M., von Hohenberg, B. C., Menchen-Trevino, E., Gackowski, T., & Wojcieszak, M. (2024) · Political Communication · doi:10.1080/10584609.2024.2423093 · Cited by 9
Using large language models for survey research in communication: opportunities and challenges
Valenzuela, S., Winter, S., & Rivera, S. (2025) · Communication and Change · doi:10.1007/s44382-025-00014-z · Cited by 8
Lorenz, A., Schmitt, C., McGregor, S. C., & Malmer, D. (2023) · Journal of Quantitative Description Digital Media · doi:10.51685/jqd.2023.015 · Cited by 8
Are Demographics Adequate Controls for Cell-Phone-Only Coverage Bias in Mass Communication Research?
Watson, B. R., Zamith, R., Cavanah, S., & Lewis, S. C. (2015) · Journalism & Mass Communication Quarterly · doi:10.1177/1077699015589187 · Cited by 8
Elvestad, E., & Shaker, L. (2017) · Nordicom review/NORDICOM review · doi:10.1515/nor-2016-0390 · Cited by 8
Not So Distinct After All: Assessing Social Stratification of News Users on the Web
Ørmen, J. (2018) · Journalism Studies · doi:10.1080/1461670x.2018.1539342 · Cited by 9
Local Weather Effects: Perception of Climate Change and Public Support for Government Intervention
Kim, J. H., Seo, M. H., & Sinclair, B. (2021) · Social Science Quarterly · doi:10.1111/ssqu.12942 · Cited by 11
Lee, H. (2021) · Sustainability · doi:10.3390/su13052723 · Cited by 9
Murakami, K., Shinozaki, N., Okuhara, T., McCaffrey, T. A., & Livingstone, M. B. E. (2023) · JMIR Public Health and Surveillance · doi:10.2196/54805 · Cited by 12
Qual foi o papel das variáveis midiáticas na eleição presidencial de 2010?
Bezerra, H. D., & Mundim, P. S. (2011) · Opinião Pública · doi:10.1590/s0104-62762011000200007 · Cited by 8
Metadata
- Authors
- Prior, M.
- Affiliations
- Princeton University (US)
- Corresponding author
- Prior, Markus
- ORCID
- Prior, Markus
- Venue
- Public Opinion Quarterly
- Publisher
- Oxford University Press (OUP)
- Published
- 2009
- Volume
- 73
- Issue
- 1
- Pages
- 130-143
- ISSN
- 0033-362X (ISSN-L)
- 1537-5331
- OpenAlex
- W2109790075
- Cited by
- 561
- References
- 35
- Citations by year
- 2026: 20 · 2025: 42 · 2024: 34 · 2023: 34 · 2022: 43 · 2021: 62 · 2020: 52 · 2019: 37 · 2018: 51 · 2017: 28 · 2016: 35 · 2015: 24 · 2014: 34 · 2013: 22 · 2012: 15
- FWCI
- 48.63
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Public Opinion Quarterly (publishedVersion)
- Topics
- Social Sciences › Communication › News Media Framing and Political Communication
- Social Sciences › Sociology and Political Science › Survey Methodology and Nonresponse
- Social Sciences › Sociology and Political Science › Media Influence and Politics
- Keywords
- measurement validity, overreporting, Nielsen ratings, network news, media influence, survey accuracy, self-assessment bias, television audience measurement
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review