{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,3]],"date-time":"2026-05-03T23:30:25Z","timestamp":1777851025417,"version":"3.51.4"},"reference-count":27,"publisher":"SAGE Publications","issue":"1","license":[{"start":{"date-parts":[[2015,7,30]],"date-time":"2015-07-30T00:00:00Z","timestamp":1438214400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["J Geriatr Psychiatry Neurol"],"published-print":{"date-parts":[[2016,1]]},"abstract":"<jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>Visual hallucinations (VH) are common in Parkinson\u2019s disease (PD) and are associated with increased morbidity and mortality. Current explanations for VH in PD suggest combined impairments in top-down attentional and bottom-up perceptual processes, which allow the passive \u201crelease\u201d of stored images. Alternative models in other disorders have suggested that top-down factors may actively encourage hallucinations. In order to explore the interaction between top-down and bottom-up visual processing in PDVH, we developed novel experimental priming tasks in which top-down verbal cues were used to prime the bottom-up recognition of partial or ambiguous pictures.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Method:<\/jats:title>\n                    <jats:p>Two groups of PD participants with (PD + VH, n = 16), and without VH (PD - VH, n = 20) were compared to a group of healthy older adults (NC, n = 20) on 3 novel measures of visual priming.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>All tasks showed significant priming effects. The PD + VH group was more impaired at accurately identifying silhouette and fragmented images compared to the PD - VH group. There were no differences in priming between the 2 PD groups.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions:<\/jats:title>\n                    <jats:p>The study showed that VH in PD are not associated with relatively greater top-down activation, and that the interaction between top-down and bottom-up processes is intact.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/0891988715598237","type":"journal-article","created":{"date-parts":[[2015,7,31]],"date-time":"2015-07-31T20:20:03Z","timestamp":1438374003000},"page":"25-30","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":9,"title":["Visual Priming and Visual Hallucinations in Parkinson\u2019s Disease. Evidence for Normal Top-Down Processes"],"prefix":"10.1177","volume":"29","author":[{"given":"Sarah","family":"Straughan","sequence":"first","affiliation":[{"name":"Mental Health Services for Older People, Sandwell Park Hospital, Hartlepool, England"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Daniel","family":"Collerton","sequence":"additional","affiliation":[{"name":"Clinical Psychology Department, Bensham Hospital, Gateshead, England"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Vicki","family":"Bruce","sequence":"additional","affiliation":[{"name":"School of Psychology, Newcastle University, Newcastle upon Tyne, England"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2015,7,30]]},"reference":[{"key":"bibr1-0891988715598237","doi-asserted-by":"publisher","DOI":"10.1093\/brain\/awp223"},{"key":"bibr2-0891988715598237","doi-asserted-by":"publisher","DOI":"10.1017\/S0140525X05000130"},{"key":"bibr3-0891988715598237","doi-asserted-by":"publisher","DOI":"10.1136\/jnnp.70.6.727"},{"key":"bibr4-0891988715598237","doi-asserted-by":"publisher","DOI":"10.1002\/mds.20308"},{"key":"bibr5-0891988715598237","doi-asserted-by":"publisher","DOI":"10.1016\/j.parkreldis.2007.05.009"},{"issue":"2","key":"bibr6-0891988715598237","first-page":"119","volume":"18","author":"Kumar S","year":"2009","journal-title":"Psychiatry J"},{"key":"bibr7-0891988715598237","doi-asserted-by":"publisher","DOI":"10.1002\/9781118892794.ch7"},{"key":"bibr8-0891988715598237","doi-asserted-by":"publisher","DOI":"10.1002\/9781118892794.ch6"},{"key":"bibr9-0891988715598237","doi-asserted-by":"publisher","DOI":"10.1002\/mds.23896"},{"key":"bibr10-0891988715598237","doi-asserted-by":"publisher","DOI":"10.1136\/jnnp.2007.116202"},{"key":"bibr11-0891988715598237","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-0404.2007.00933.x"},{"key":"bibr12-0891988715598237","doi-asserted-by":"publisher","DOI":"10.1016\/j.jocn.2006.05.006"},{"key":"bibr13-0891988715598237","doi-asserted-by":"publisher","DOI":"10.1159\/000100850"},{"key":"bibr14-0891988715598237","doi-asserted-by":"publisher","DOI":"10.1002\/mds.22270"},{"key":"bibr15-0891988715598237","doi-asserted-by":"publisher","DOI":"10.1016\/j.parkreldis.2010.01.003"},{"key":"bibr16-0891988715598237","doi-asserted-by":"publisher","DOI":"10.1093\/brain\/awr225"},{"key":"bibr17-0891988715598237","doi-asserted-by":"publisher","DOI":"10.1002\/gps.3947"},{"key":"bibr18-0891988715598237","doi-asserted-by":"publisher","DOI":"10.1017\/S135561770065508X"},{"key":"bibr19-0891988715598237","doi-asserted-by":"publisher","DOI":"10.1080\/09541440143000014"},{"key":"bibr20-0891988715598237","doi-asserted-by":"publisher","DOI":"10.1016\/j.brat.2005.03.008"},{"key":"bibr21-0891988715598237","doi-asserted-by":"publisher","DOI":"10.3758\/APP.72.1.168"},{"issue":"1","key":"bibr22-0891988715598237","doi-asserted-by":"crossref","first-page":"289","DOI":"10.2478\/v10053-008-0031-2","volume":"3","author":"Kiefer M","year":"2008","journal-title":"Adv Cogn Psychol"},{"key":"bibr23-0891988715598237","doi-asserted-by":"publisher","DOI":"10.1016\/0022-3956(75)90026-6"},{"key":"bibr24-0891988715598237","volume-title":"Visual Object and Space Perception Battery","author":"Warrington EK","year":"1991"},{"key":"bibr25-0891988715598237","doi-asserted-by":"publisher","DOI":"10.1002\/gps.1965"},{"key":"bibr26-0891988715598237","first-page":"153","volume-title":"Recent Developments in Parkinson\u2019s Disease","volume":"2","author":"Fahn S","year":"2007"},{"key":"bibr27-0891988715598237","doi-asserted-by":"publisher","DOI":"10.1097\/OPX.0b013e3181c61117"}],"container-title":["Journal of Geriatric Psychiatry and Neurology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/0891988715598237","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/full-xml\/10.1177\/0891988715598237","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/0891988715598237","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T22:15:24Z","timestamp":1777500924000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.sagepub.com\/doi\/10.1177\/0891988715598237"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2015,7,30]]},"references-count":27,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2016,1]]}},"alternative-id":["10.1177\/0891988715598237"],"URL":"https:\/\/doi.org\/10.1177\/0891988715598237","relation":{},"ISSN":["0891-9887","1552-5708"],"issn-type":[{"value":"0891-9887","type":"print"},{"value":"1552-5708","type":"electronic"}],"subject":[],"published":{"date-parts":[[2015,7,30]]}}}