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Physiological accounts of emotional aging propose that age\u2010related changes in autonomic and interoceptive function reduce the informativeness of bodily signals, weakening the coupling between feelings and bodily responses. We test whether subjective\u2013physiological coherence is lower in older vs. younger normoxic adults, lower in hypoxic vs. normoxic younger adults, and similar in hypoxic younger adults and older normoxic adults; in secondary mechanism\u2010oriented analyses, we examine whether heart\u2010rate variability and cardiac interoceptive accuracy are statistically related to group differences in coherence. We will test these questions in three groups (\n                    <jats:italic>N<\/jats:italic>\n                    \u2009=\u2009120): younger adults in normoxia, younger adults under acute hypoxia (FiO\n                    <jats:sub>2<\/jats:sub>\n                    \u2009\u2248\u200912%), and older adults in normoxia. Participants will view emotional images and provide trial\u2010wise ratings of affect and approach motivation while heart rate and skin conductance are recorded. Emotional coherence will be indexed primarily by within\u2010person correlations between subjective arousal ratings and autonomic reactivity, with approach motivation and valence examined as complementary subjective dimensions.\n                  <\/jats:p>","DOI":"10.1111\/psyp.70348","type":"journal-article","created":{"date-parts":[[2026,7,13]],"date-time":"2026-07-13T04:46:00Z","timestamp":1783917960000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Emotional Coherence Under Hypoxia and Aging: A Registered Report on Subjective\u2013Physiological Coupling"],"prefix":"10.1111","volume":"63","author":[{"given":"Pierrick","family":"Laulan","sequence":"first","affiliation":[{"name":"Institute of Psychology University of Lausanne  Lausanne Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gr\u00e9goire","family":"Millet","sequence":"additional","affiliation":[{"name":"Institute of Sport Sciences University of Lausanne  Lausanne Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ulrike","family":"Rimmele","sequence":"additional","affiliation":[{"name":"Institute of Psychology University of Lausanne  Lausanne Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,7,12]]},"reference":[{"key":"e_1_2_9_2_1","first-page":"xv","volume-title":"How Emotions Are Made: The Secret Life of the Brain","author":"Barrett L. 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