{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T15:33:33Z","timestamp":1790264013318,"version":"4.1.0"},"reference-count":51,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2018,8,6]],"date-time":"2018-08-06T00:00:00Z","timestamp":1533513600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["bpspsychub.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["British J Social Psychol"],"published-print":{"date-parts":[[2018,10]]},"abstract":"<jats:p>\n                    Previous research on collective action has suggested that both intra\u2010 and intergroup interactions are important in producing psychological change. In this study, we examine how these two forms of interaction relate to each other over time. We present results from a longitudinal ethnographic study of participation in an environmental campaign, documenting endurance and prevalence of psychological change. Participants, locals (\n                    <jats:italic>n<\/jats:italic>\n                    \u00a0=\u00a014) and self\u2010defined activists (\n                    <jats:italic>n<\/jats:italic>\n                    \u00a0=\u00a014), connected enduring psychological changes, such as changes in consumer behaviour and attitudes to their involvement in the environmental campaign. Thematic analysis of interviews suggested that participants linked the process of change to categorizing themselves in a new environmental\u2010activist way that influenced their everyday lives beyond the immediate campaign. This recategorization was a result of a conflictual intergroup relationship with the police. The intergroup interaction produced supportive within\u2010group relationships that facilitated the feasibility and sustainability of new world views that were maintained by staying active in the campaign. The data from the study support and extend previous research on collective action and are the basis of a model, suggesting that intragroup processes condition the effects of intergroup dynamics on sustained psychological change.\n                  <\/jats:p>","DOI":"10.1111\/bjso.12270","type":"journal-article","created":{"date-parts":[[2018,8,7]],"date-time":"2018-08-07T05:36:03Z","timestamp":1533620163000},"page":"855-877","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":89,"title":["How collective action produces psychological change and how that change endures over time: A case study of an environmental campaign"],"prefix":"10.1111","volume":"57","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0514-6749","authenticated-orcid":false,"given":"Sara","family":"Vestergren","sequence":"first","affiliation":[{"name":"School of Psychology Keele University UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"John","family":"Drury","sequence":"additional","affiliation":[{"name":"University of Sussex Brighton UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eva Hammar","family":"Chiriac","sequence":"additional","affiliation":[{"name":"Link\u00f6ping University UK"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2018,8,6]]},"reference":[{"key":"e_1_2_6_2_1","doi-asserted-by":"publisher","DOI":"10.1177\/146879410100100307"},{"key":"e_1_2_6_3_1","doi-asserted-by":"publisher","DOI":"10.1080\/14742830903024333"},{"key":"e_1_2_6_4_1","doi-asserted-by":"publisher","DOI":"10.1080\/10463283.2015.1094265"},{"key":"e_1_2_6_5_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.2044-8309.2010.02001.x"},{"key":"e_1_2_6_6_1","doi-asserted-by":"publisher","DOI":"10.1207\/s15327949pac1103_7"},{"key":"e_1_2_6_7_1","doi-asserted-by":"publisher","DOI":"10.1177\/0146167210397553"},{"key":"e_1_2_6_8_1","doi-asserted-by":"publisher","DOI":"10.1191\/1478088706qp063oa"},{"key":"e_1_2_6_9_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1533-8525.1992.tb00362.x"},{"key":"e_1_2_6_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jenvp.2011.05.002"},{"key":"e_1_2_6_11_1","doi-asserted-by":"publisher","DOI":"10.1177\/0959354301115001"},{"key":"e_1_2_6_12_1","doi-asserted-by":"publisher","DOI":"10.1348\/014466608X357893"},{"key":"e_1_2_6_13_1","doi-asserted-by":"publisher","DOI":"10.1348\/014466600164642"},{"key":"e_1_2_6_14_1","doi-asserted-by":"publisher","DOI":"10.1002\/ejsp.231"},{"key":"e_1_2_6_15_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1540-4560.2009.01622.x"},{"key":"e_1_2_6_16_1","doi-asserted-by":"publisher","DOI":"10.1080\/1474283032000139779"},{"key":"e_1_2_6_17_1","doi-asserted-by":"publisher","DOI":"10.1177\/1525822X0101300103"},{"key":"e_1_2_6_18_1","doi-asserted-by":"publisher","DOI":"10.2307\/2095823"},{"key":"e_1_2_6_19_1","doi-asserted-by":"publisher","DOI":"10.1037\/0022-3514.66.1.196"},{"key":"e_1_2_6_20_1","doi-asserted-by":"crossref","first-page":"199","DOI":"10.17813\/maiq.14.2.328913653020k1l9","article-title":"External pressure and local mobilization: Transnational activism and the emergence of the Chinese labor movement","volume":"14","author":"Friedman E.","year":"2009","journal-title":"Mobilization"},{"key":"e_1_2_6_21_1","doi-asserted-by":"publisher","DOI":"10.2307\/2095630"},{"key":"e_1_2_6_22_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1467-9221.2006.00001.x"},{"key":"e_1_2_6_23_1","doi-asserted-by":"publisher","DOI":"10.1002\/(SICI)1520-6793(200002)17:2<79::AID-MAR2>3.0.CO;2-0"},{"key":"e_1_2_6_24_1","doi-asserted-by":"publisher","DOI":"10.1111\/0162-895X.00280"},{"key":"e_1_2_6_25_1","doi-asserted-by":"publisher","DOI":"10.1086\/493794"},{"key":"e_1_2_6_26_1","doi-asserted-by":"publisher","DOI":"10.3102\/00346543052001031"},{"key":"e_1_2_6_27_1","doi-asserted-by":"publisher","DOI":"10.3200\/SOCP.144.3.229-245"},{"key":"e_1_2_6_28_1","doi-asserted-by":"publisher","DOI":"10.1111\/josi.12165"},{"key":"e_1_2_6_29_1","unstructured":"Louis W. 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