{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,13]],"date-time":"2026-04-13T15:45:41Z","timestamp":1776095141156,"version":"3.50.1"},"publisher-location":"New York, New York, USA","reference-count":63,"publisher":"ACM Press","license":[{"start":{"date-parts":[[2015,1,1]],"date-time":"2015-01-01T00:00:00Z","timestamp":1420070400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.acm.org\/publications\/policies\/copyright_policy#Background"}],"funder":[{"DOI":"10.13039\/100000002","name":"National Institutes of Health","doi-asserted-by":"publisher","award":["1R01GM11269701"],"award-info":[{"award-number":["1R01GM11269701"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2015]]},"DOI":"10.1145\/2700171.2791026","type":"proceedings-article","created":{"date-parts":[[2015,8,26]],"date-time":"2015-08-26T16:48:13Z","timestamp":1440607693000},"page":"85-94","source":"Crossref","is-referenced-by-count":98,"title":["Detecting Changes in Suicide Content Manifested in Social Media Following Celebrity Suicides"],"prefix":"10.1145","author":[{"given":"Mrinal","family":"Kumar","sequence":"first","affiliation":[]},{"given":"Mark","family":"Dredze","sequence":"additional","affiliation":[]},{"given":"Glen","family":"Coppersmith","sequence":"additional","affiliation":[]},{"given":"Munmun","family":"De Choudhury","sequence":"additional","affiliation":[]}],"member":"320","reference":[{"key":"key-10.1145\/2700171.2791026-1","doi-asserted-by":"crossref","unstructured":"A. G. Billings and R. H. Moos. Coping, stress, and social resources among adults with unipolar depression. Journal of personality and social psychology, 46(4):877, 1984.","DOI":"10.1037\/0022-3514.46.4.877"},{"key":"key-10.1145\/2700171.2791026-2","doi-asserted-by":"crossref","unstructured":"S. Bird. NLTK: the natural language toolkit. In COLING\/ACL Interactive presentation sessions, 2006.","DOI":"10.3115\/1225403.1225421"},{"key":"key-10.1145\/2700171.2791026-3","unstructured":"D. M. Blei, A. Y. Ng, and M. I. Jordan. Latent dirichlet allocation. Journal of Machine Learning Research (JMLR), 3:993--1022, 2003."},{"key":"key-10.1145\/2700171.2791026-4","doi-asserted-by":"crossref","unstructured":"A. Boals and K. Klein. Word use in emotional narratives about failed romantic relationships and subsequent mental health. Journal of Language and Social Psychology, 24(3):252--268, 2005.","DOI":"10.1177\/0261927X05278386"},{"key":"key-10.1145\/2700171.2791026-5","doi-asserted-by":"crossref","unstructured":"A. T. Cheng, K. Hawton, T. H. Chen, A. M. Yen, C.-Y. Chen, L.-C. Chen, and P.-R. Teng. The influence of media coverage of a celebrity suicide on subsequent suicide attempts. Journal of Clinical Psychiatry, 68(6):862--866, 2007.","DOI":"10.4088\/JCP.v68n0606"},{"key":"key-10.1145\/2700171.2791026-6","doi-asserted-by":"crossref","unstructured":"A. Chester and A. O'Hara. Image, identity and pseudonymity in online discussions. International Journal of Learning, 13(12), 2007.","DOI":"10.18848\/1447-9494\/CGP\/v13i12\/45145"},{"key":"key-10.1145\/2700171.2791026-7","unstructured":"C. Chung and J. W. Pennebaker. The psychological functions of function words. Social Comm., pages 343--359, 2007."},{"key":"key-10.1145\/2700171.2791026-8","doi-asserted-by":"crossref","unstructured":"G. Coppersmith, M. Dredze, and C. Harman. Quantifying mental health signals in twitter. In ACL Workshop on Computational Linguistics and Clinical Psychology, 2014.","DOI":"10.3115\/v1\/W14-3207"},{"key":"key-10.1145\/2700171.2791026-9","doi-asserted-by":"crossref","unstructured":"G. Coppersmith, C. Harman, and M. Dredze. Measuring post traumatic stress disorder in twitter. In International Conference on Weblogs and Social Media (ICWSM), 2014.","DOI":"10.1609\/icwsm.v8i1.14574"},{"key":"key-10.1145\/2700171.2791026-10","doi-asserted-by":"crossref","unstructured":"M. De Choudhury, S. Counts, E. Horvitz, and A. Hoff. Characterizing and predicting postpartum depression from facebook data. In Computer-Supported Cooperative Work and Social Computing (CSCW), 2014.","DOI":"10.1145\/2531602.2531675"},{"key":"key-10.1145\/2700171.2791026-11","doi-asserted-by":"crossref","unstructured":"M. De Choudhury and S. De. Mental health discourse on reddit: Self-disclosure, social support, and anonymity. In International Conference on Weblogs and Social Media (ICWSM), 2014.","DOI":"10.1609\/icwsm.v8i1.14526"},{"key":"key-10.1145\/2700171.2791026-12","unstructured":"M. De Choudhury, M. Gamon, S. Counts, and E. Horvitz. Predicting depression via social media. In International Conference on Weblogs and Social Media (ICWSM), 2013."},{"key":"key-10.1145\/2700171.2791026-13","doi-asserted-by":"crossref","unstructured":"M. De Choudhury, M. R. Morris, and R. W. White. Seeking and sharing health information online: Comparing search engines and social media. In Human factors in computing systems (CHI), 2014.","DOI":"10.1145\/2556288.2557214"},{"key":"key-10.1145\/2700171.2791026-14","unstructured":"K. Dinakar, B. Jones, H. Lieberman, R. Picard, C. Rose, and M. T. R. Reichart. You too?! mixed initiative lda story-matching to help teens in distress. In International Conference on Weblogs and Social Media (ICWSM), 2012."},{"key":"key-10.1145\/2700171.2791026-15","doi-asserted-by":"crossref","unstructured":"R. M. Fernquist and P. Cutright. Societal integration and age-standardized suicide rates in 21 developed countries, 1955--1989. Social Science Research, 27(2):109--127, 1998.","DOI":"10.1006\/ssre.1998.0615"},{"key":"key-10.1145\/2700171.2791026-16","doi-asserted-by":"crossref","unstructured":"K.-w. Fu and C. Chan. A study of the impact of thirteen celebrity suicides on subsequent suicide rates in south korea from 2005 to 2009. PloS one, 8(1):e53870, 2013.","DOI":"10.1371\/journal.pone.0053870"},{"key":"key-10.1145\/2700171.2791026-17","doi-asserted-by":"crossref","unstructured":"K.-w. Fu and P. S. Yip. Long-term impact of celebrity suicide on suicidal ideation: Results from a population-based study. Journal of Epidemiology and Community Health, 61(6):540--546, 2007.","DOI":"10.1136\/jech.2005.045005"},{"key":"key-10.1145\/2700171.2791026-18","doi-asserted-by":"crossref","unstructured":"S. A. Golder and M. W. Macy. Diurnal and seasonal mood vary with work, sleep, and daylength across diverse cultures. Science, 333(6051):1878--1881, 2011.","DOI":"10.1126\/science.1202775"},{"key":"key-10.1145\/2700171.2791026-19","doi-asserted-by":"crossref","unstructured":"M. S. Gould. Suicide and the media. Annals of the New York Academy of Sciences, 932(1):200--224, 2001.","DOI":"10.1111\/j.1749-6632.2001.tb05807.x"},{"key":"key-10.1145\/2700171.2791026-20","doi-asserted-by":"crossref","unstructured":"S. H. Hemenover. The good, the bad, and the healthy: Impacts of emotional disclosure of trauma on resilient self-concept and psychological distress. Personality and Social Psychology Bulletin, 29(10):1236--1244, 2003.","DOI":"10.1177\/0146167203255228"},{"key":"key-10.1145\/2700171.2791026-21","unstructured":"M. Hoffman, F. R. Bach, and D. M. Blei. Online learning for latent dirichlet allocation. In Neural Information Processing Systems (NIPS), 2010."},{"key":"key-10.1145\/2700171.2791026-22","doi-asserted-by":"crossref","unstructured":"C. M. Homan, N. Lu, X. Tu, M. C. Lytle, and V. Silenzio. Social structure and depression in trevorspace. In Computer-Supported Cooperative Work and Social Computing (CSCW), 2014.","DOI":"10.1145\/2531602.2531704"},{"key":"key-10.1145\/2700171.2791026-23","doi-asserted-by":"crossref","unstructured":"D. J. Houghton and A. N. Joinson. Linguistic markers of secrets and sensitive self-disclosure in twitter. In Hawaii International Conference on System Science (HICSS), 2012.","DOI":"10.1109\/HICSS.2012.415"},{"key":"key-10.1145\/2700171.2791026-24","doi-asserted-by":"crossref","unstructured":"S. Jamison-Powell, C. Linehan, L. Daley, A. Garbett, and S. Lawson. I can't get no sleep: discussing insomnia on twitter. In Human factors in computing systems (CHI), 2012.","DOI":"10.1145\/2207676.2208612"},{"key":"key-10.1145\/2700171.2791026-25","doi-asserted-by":"crossref","unstructured":"N. Lapidot-Lefler and A. Barak. Effects of anonymity, invisibility, and lack of eye-contact on toxic online disinhibition. Computers in human behavior, 28(2):434--443, 2012.","DOI":"10.1016\/j.chb.2011.10.014"},{"key":"key-10.1145\/2700171.2791026-26","unstructured":"M. A. Long. As if day had rearranged into night: suicidal tendencies in the poetry of anne sexton. Lit Psychol, 39:26--41, 1993."},{"key":"key-10.1145\/2700171.2791026-27","doi-asserted-by":"crossref","unstructured":"D. D. Luxton, J. D. June, and J. M. Fairall. Social media and suicide: A public health perspective. American Journal of Public Health, 102(S2):S195--S200, 2012.","DOI":"10.2105\/AJPH.2011.300608"},{"key":"key-10.1145\/2700171.2791026-28","doi-asserted-by":"crossref","unstructured":"T. R. Lynch, J. Cheavens, J. Q. Morse, and M. Rosenthal. A model predicting suicidal ideation and hopelessness in depressed older adults: The impact of emotion inhibition and affect intensity. Aging & Mental Health, 8(6):486--497,2004.","DOI":"10.1080\/13607860412331303775"},{"key":"key-10.1145\/2700171.2791026-29","doi-asserted-by":"crossref","unstructured":"M. A. Moreno, D. A. Christakis, K. G. Egan, L. N. Brockman, and T. Becker. Associations between displayed alcohol references on facebook and problem drinking among college students. Archives of Pediatrics & Adolescent Medicine, 166(2):157--163, 2011.","DOI":"10.1001\/archpediatrics.2011.180"},{"key":"key-10.1145\/2700171.2791026-30","doi-asserted-by":"crossref","unstructured":"E. L. Murnane and S. Counts. Unraveling abstinence and relapse: smoking cessation reflected in social media. In Human factors in computing systems (CHI), 2014.","DOI":"10.1145\/2556288.2557145"},{"key":"key-10.1145\/2700171.2791026-31","doi-asserted-by":"crossref","unstructured":"T. Niederkrotenthaler, K.-w. Fu, P. S. Yip, D. Y. Fong, S. Stack, Q. Cheng, and J. Pirkis. Changes in suicide rates following media reports on celebrity suicide: a meta-analysis. Journal of epidemiology and community health, 66(11):1037--1042, 2012.","DOI":"10.1136\/jech-2011-200707"},{"key":"key-10.1145\/2700171.2791026-32","unstructured":"T. Niederkrotenthaler, A. Herberth, and G. Sonneck. The \"werther-effect\": legend or reality? Neuropsychiatrie: Klinik, Diagnostik, Therapie und Rehabilitation: Organ der Gesellschaft Osterreichischer Nervenarzte und Psychiater, 21(4):284--290, 2006."},{"key":"key-10.1145\/2700171.2791026-33","doi-asserted-by":"crossref","unstructured":"T. Niederkrotenthaler, B. Till, N. D. Kapusta, M. Voracek, K. Dervic, and G. Sonneck. Copycat effects after media reports on suicide: A population-based ecologic study. Social science & medicine, 69(7):1085--1090, 2009.","DOI":"10.1016\/j.socscimed.2009.07.041"},{"key":"key-10.1145\/2700171.2791026-34","doi-asserted-by":"crossref","unstructured":"I. O'Donnell, R. Farmer, and J. Catalan. Suicide notes. The British Journal of Psychiatry, 163(1):45--48, 1993.","DOI":"10.1192\/bjp.163.1.45"},{"key":"key-10.1145\/2700171.2791026-35","doi-asserted-by":"crossref","unstructured":"C. E. Osgood and E. G. Walker. Motivation and language behavior: A content analysis of suicide notes. The Journal of Abnormal and Social Psychology, 59(1):58, 1959.","DOI":"10.1037\/h0047078"},{"key":"key-10.1145\/2700171.2791026-36","unstructured":"M. Park, D. W. McDonald, and M. Cha. Perception differences between the depressed and non-depressed users in twitter. In International Conference on Weblogs and Social Media (ICWSM), 2013."},{"key":"key-10.1145\/2700171.2791026-37","unstructured":"M. J. Paul and M. Dredze. You are what you tweet: Analyzing twitter for public health. In International Conference on Weblogs and Social Media (ICWSM), 2011."},{"key":"key-10.1145\/2700171.2791026-38","doi-asserted-by":"crossref","unstructured":"M. J. Paul and M. Dredze. Discovering health topics in social media using topic models. PLoS ONE, 9(8), 2014.","DOI":"10.1371\/journal.pone.0103408"},{"key":"key-10.1145\/2700171.2791026-39","doi-asserted-by":"crossref","unstructured":"M. J. Paul, M. Dredze, and D. Broniatowski. Twitter improves influenza forecasting. PLOS Currents Outbreaks, 2014.","DOI":"10.1371\/currents.outbreaks.90b9ed0f59bae4ccaa683a39865d9117"},{"key":"key-10.1145\/2700171.2791026-40","unstructured":"J. W. Pennebaker, M. E. Francis, and R. J. Booth. Linguistic inquiry and word count: Liwc 2001. Mahway: Lawrence Erlbaum Associates, 71:2001, 2001."},{"key":"key-10.1145\/2700171.2791026-41","doi-asserted-by":"crossref","unstructured":"J. W. Pennebaker, T. J. Mayne, and M. E. Francis. Linguistic predictors of adaptive bereavement. Journal of personality and social psychology, 72(4):863, 1997.","DOI":"10.1037\/0022-3514.72.4.863"},{"key":"key-10.1145\/2700171.2791026-42","doi-asserted-by":"crossref","unstructured":"K. Petrie and R. Brook. Sense of coherence, self-esteem, depression and hopelessness as correlates of reattempting suicide. British Journal of Clinical Psychology, 31(3):293--300, 1992.","DOI":"10.1111\/j.2044-8260.1992.tb00996.x"},{"key":"key-10.1145\/2700171.2791026-43","doi-asserted-by":"crossref","unstructured":"J. E. Pirkis, P. M. Burgess, C. Francis, R. W. Blood, and D. J. Jolley. The relationship between media reporting of suicide and actual suicide in australia. Social science & medicine, 62(11):2874--2886, 2006.","DOI":"10.1016\/j.socscimed.2005.11.033"},{"key":"key-10.1145\/2700171.2791026-44","doi-asserted-by":"crossref","unstructured":"D. W. Prezant and R. A. Neimeyer. Cognitive predictors of depression and suicide ideation. Suicide and Life-Threatening Behavior, 18(3):259--264, 1988.","DOI":"10.1111\/j.1943-278X.1988.tb00161.x"},{"key":"key-10.1145\/2700171.2791026-45","doi-asserted-by":"crossref","unstructured":"K. W. Prier, M. S. Smith, C. Giraud-Carrier, and C. L. Hanson. Identifying health-related topics on twitter. In Social computing, behavioral-cultural modeling and prediction, pages 18--25. Springer, 2011.","DOI":"10.1007\/978-3-642-19656-0_4"},{"key":"key-10.1145\/2700171.2791026-46","unstructured":"R.Rěhuřek and P.Sojka. Software Framework for Topic Modelling with Large Corpora. In LREC Workshop on New Challenges for NLP Frameworks, 2010."},{"key":"key-10.1145\/2700171.2791026-47","doi-asserted-by":"crossref","unstructured":"S. Rude, E.-M. Gortner, and J. Pennebaker. Language use of depressed and depression-vulnerable college students. Cognition & Emotion, 18(8):1121--1133, 2004.","DOI":"10.1080\/02699930441000030"},{"key":"key-10.1145\/2700171.2791026-48","doi-asserted-by":"crossref","unstructured":"T. D. Ruder, G. M. Hatch, G. Ampanozi, M. J. Thali, and N. Fischer. Suicide announcement on facebook. Crisis: The Journal of Crisis Intervention and Suicide Prevention, 32(5):280--282, 2011.","DOI":"10.1027\/0227-5910\/a000086"},{"key":"key-10.1145\/2700171.2791026-49","unstructured":"A. Sadilek, H. A. Kautz, and V. Silenzio. Modeling spread of disease from social interactions. In International Conference on Weblogs and Social Media (ICWSM), 2012."},{"key":"key-10.1145\/2700171.2791026-50","doi-asserted-by":"crossref","unstructured":"H. A. Schwartz, J. Eichstaedt, M. L. Kern, G. Park, M. Sap, D. Stillwell, M. Kosinski, and L. Ungar. Towards assessing changes in degree of depression through facebook. In Association for Computational Linguistics (ACL), 2014.","DOI":"10.3115\/v1\/W14-3214"},{"key":"key-10.1145\/2700171.2791026-51","doi-asserted-by":"crossref","unstructured":"E. S. Shneidman. Suicide notes reconsidered. Psychiatry, 36(4):379--394, 1973.","DOI":"10.1080\/00332747.1973.11023772"},{"key":"key-10.1145\/2700171.2791026-52","doi-asserted-by":"crossref","unstructured":"E. S. Shneidman and N. L. Farberow. Clues to suicide. Public Health Reports, 71(2):109, 1956.","DOI":"10.2307\/4589373"},{"key":"key-10.1145\/2700171.2791026-53","doi-asserted-by":"crossref","unstructured":"M. A. Silverman and N. P. Will. Sylvia plath and the failure of emotional self-repair through poetry. The Psychoanalytic Quarterly, 1986.","DOI":"10.1080\/21674086.1986.11927132"},{"key":"key-10.1145\/2700171.2791026-54","doi-asserted-by":"crossref","unstructured":"M. Sisask and A. Värnik. Media roles in suicide prevention: a systematic review. International journal of environmental research and public health, 9(1):123--138, 2012.","DOI":"10.3390\/ijerph9010123"},{"key":"key-10.1145\/2700171.2791026-55","doi-asserted-by":"crossref","unstructured":"J. M. Smyth. Written emotional expression: effect sizes, outcome types, and moderating variables. Journal of consulting and clinical psychology, 66(1):174, 1998.","DOI":"10.1037\/0022-006X.66.1.174"},{"key":"key-10.1145\/2700171.2791026-56","doi-asserted-by":"crossref","unstructured":"S. Stack. Media coverage as a risk factor in suicide. Journal of epidemiology and community health, 57(4):238--240, 2003.","DOI":"10.1136\/jech.57.4.238"},{"key":"key-10.1145\/2700171.2791026-57","doi-asserted-by":"crossref","unstructured":"S. W. Stirman and J. W. Pennebaker. Word use in the poetry of suicidal and nonsuicidal poets. Psychosomatic Medicine, 63(4):517--522, 2001.","DOI":"10.1097\/00006842-200107000-00001"},{"key":"key-10.1145\/2700171.2791026-58","doi-asserted-by":"crossref","unstructured":"J. Suler. The online disinhibition effect. Cyberpsychology & behavior, 7(3):321--326, 2004.","DOI":"10.1089\/1094931041291295"},{"key":"key-10.1145\/2700171.2791026-59","doi-asserted-by":"crossref","unstructured":"Y. R. Tausczik and J. W. Pennebaker. The psychological meaning of words: Liwc and computerized text analysis methods. Journal of Language and Social Psychology, 29(1):24--54, 2010.","DOI":"10.1177\/0261927X09351676"},{"key":"key-10.1145\/2700171.2791026-60","doi-asserted-by":"crossref","unstructured":"K. M. Thomas and M. Duke. Depressed writing: Cognitive distortions in the works of depressed and nondepressed poets and writers. Psychology of Aesthetics, Creativity, and the Arts, 1(4):204, 2007.","DOI":"10.1037\/1931-3896.1.4.204"},{"key":"key-10.1145\/2700171.2791026-61","doi-asserted-by":"crossref","unstructured":"I. M. Wasserman. Imitation and suicide: A reexamination of the werther effect. American sociological review, pages 427--436, 1984.","DOI":"10.2307\/2095285"},{"key":"key-10.1145\/2700171.2791026-62","doi-asserted-by":"crossref","unstructured":"H.-H. Won, W. Myung, G.-Y. Song, W.-H. Lee, J.-W. Kim, B. J. Carroll, and D. K. Kim. Predicting national suicide numbers with social media data. PloS one, 8(4):e61809, 2013.","DOI":"10.1371\/journal.pone.0061809"},{"key":"key-10.1145\/2700171.2791026-63","doi-asserted-by":"crossref","unstructured":"P. S. Yip, K.-W. Fu, K. C. Yang, B. Y. Ip, C. L. Chan, E. Y. Chen, D. T. Lee, F. Y. Law, and K. Hawton. The effects of a celebrity suicide on suicide rates in hong kong. Journal of affective disorders, 93(1):245--252, 2006.","DOI":"10.1016\/j.jad.2006.03.015"}],"event":{"name":"the 26th ACM Conference","location":"Guzelyurt, Northern Cyprus","acronym":"HT '15","number":"26","sponsor":["SIGWEB, ACM Special Interest Group on Hypertext, Hypermedia, and Web","SIGCHI, ACM Special Interest Group on Computer-Human Interaction"],"start":{"date-parts":[[2015,9,1]]},"end":{"date-parts":[[2015,9,4]]}},"container-title":["Proceedings of the 26th ACM Conference on Hypertext & Social Media - HT '15"],"original-title":[],"link":[{"URL":"https:\/\/dl.acm.org\/doi\/10.1145\/2700171.2791026","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/dl.acm.org\/ft_gateway.cfm?id=2791026&ftid=1615507&dwn=1","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,6,18]],"date-time":"2025-06-18T06:17:00Z","timestamp":1750227420000},"score":1,"resource":{"primary":{"URL":"http:\/\/dl.acm.org\/citation.cfm?doid=2700171.2791026"}},"subtitle":[],"proceedings-subject":"Hypertext & Social Media","short-title":[],"issued":{"date-parts":[[2015]]},"references-count":63,"URL":"https:\/\/doi.org\/10.1145\/2700171.2791026","relation":{},"subject":[],"published":{"date-parts":[[2015]]}}}