{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,12]],"date-time":"2026-10-12T09:46:58Z","timestamp":1791798418322,"version":"4.3.4"},"reference-count":50,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2026,5,27]],"date-time":"2026-05-27T00:00:00Z","timestamp":1779840000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,5,27]],"date-time":"2026-05-27T00:00:00Z","timestamp":1779840000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["bpspsychub.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["British J Clinic Psychol"],"published-print":{"date-parts":[[2026,11]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Objectives<\/jats:title>\n                    <jats:p>Insomnia is associated with mental ill health, worry and rumination\u2014the two latter contribute to pre\u2010sleep cognitive arousal. These variables also associate with psychological inflexibility, including cognitive fusion (CF), a literal attachment to unhelpful thoughts, patterns and rules. Good sleepers generally have low CF, good sleep hygiene and a belief in sleep control, but individuals high in CF may have unhelpful beliefs about sleep hygiene and sleep control.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>We investigated associations between CF, sleep hygiene and sleep control, hypothesizing that each would contribute significant variance to insomnia and mediate the relationship between CF and insomnia.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Participants were 411 adults (\n                      <jats:italic>M<\/jats:italic>\n                      <jats:sub>\n                        <jats:italic>age<\/jats:italic>\n                      <\/jats:sub>\n                      \u2009=\u200945.9\u2009years,\n                      <jats:italic>SD<\/jats:italic>\n                      \u2009=\u200915.6) completing an online survey including demographics, and questionnaires about insomnia (ISI), CF (CFQ), sleep hygiene (SHS) and sleep control (BRISC). Hierarchical regression accounted for 34% of variance in insomnia (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u2009.001), showing that after controlling for demographic variables, CF, sleep hygiene and sleep control each accounted for significant variance in insomnia, with sleep control the strongest predictor (\n                      <jats:italic>\u03b2<\/jats:italic>\n                      \u2009=\u2009\u2212.304). Parallel mediation modelling accounting for 22.2% of variance in insomnia (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u2009.001) showed both sleep hygiene and sleep control partially mediated the CF and insomnia relationship.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Our study shows for the first time that CF, sleep hygiene and sleep control beliefs are inter\u2010related in their impact on insomnia. As CF is a core component of psychological inflexibility, ACT plus behaviour therapy (ACT\u2010I) may be a more suitable insomnia intervention than CBT plus behaviour therapy (CBT\u2010I) for some people.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/bjc.70072","type":"journal-article","created":{"date-parts":[[2026,5,27]],"date-time":"2026-05-27T09:22:17Z","timestamp":1779873737000},"page":"1262-1275","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Sleep hygiene and sleep control mediate the relationship between cognitive fusion and insomnia severity"],"prefix":"10.1111","volume":"65","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4911-7181","authenticated-orcid":false,"given":"Amanda L.","family":"Richdale","sequence":"first","affiliation":[{"name":"Olga Tennison Autism Research Centre, School of Psychology and Public Health La Trobe University  Melbourne Victoria Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0005-9022-9531","authenticated-orcid":false,"given":"Francesco R.","family":"De Maria","sequence":"additional","affiliation":[{"name":"Department of Psychology, Therapy and Counselling, School of Psychology and Public Health La Trobe University  Melbourne Victoria Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5815-1213","authenticated-orcid":false,"given":"Eric M. 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