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Two processes implicated in the development of CU traits are hyporeactivity to and inaccurate recognition of others\u2019 emotions. Although many studies link CU traits to emotional processing deficits, findings have been inconsistent across age and sex. We conducted multilevel meta-analyses of emotional reactivity and recognition, accounting for age and sex as moderators, to clarify these discrepancies. A four-level meta-analysis indicated CU traits were negatively associated with emotional reactivity to both broad emotional stimuli (\n                    <jats:italic>r<\/jats:italic>\n                    \u2009=\u2009\u2212\u2009.23,\n                    <jats:italic>p<\/jats:italic>\n                    &lt; .0001;\n                    <jats:italic>k<\/jats:italic>\n                    \u2009=\u2009106,\n                    <jats:italic>n<\/jats:italic>\n                    <jats:sub>\n                      <jats:italic>ES<\/jats:italic>\n                    <\/jats:sub>\n                    = 402) and distress-specific stimuli (\n                    <jats:italic>r<\/jats:italic>\n                    \u2009=\u2009\u2212\u2009.22,\n                    <jats:italic>p<\/jats:italic>\n                    &lt; .0001;\n                    <jats:italic>k<\/jats:italic>\n                    \u2009=\u200984,\n                    <jats:italic>n<\/jats:italic>\n                    <jats:sub>\n                      <jats:italic>ES<\/jats:italic>\n                    <\/jats:sub>\n                    = 234), with no moderation by age or sex. Similarly, a three-level meta-analysis showed CU traits were negatively associated with recognition accuracy for both broad facial emotions (\n                    <jats:italic>r<\/jats:italic>\n                    \u2009=\u2009\u2212\u2009.09,\n                    <jats:italic>p<\/jats:italic>\n                    &lt; .0001;\n                    <jats:italic>k<\/jats:italic>\n                    \u2009=\u200997,\n                    <jats:italic>n<\/jats:italic>\n                    <jats:sub>\n                      <jats:italic>ES<\/jats:italic>\n                    <\/jats:sub>\n                    = 437) and distress (e.g., fear, sadness;\n                    <jats:italic>r<\/jats:italic>\n                    \u2009=\u2009\u2212\u2009.10,\n                    <jats:italic>p<\/jats:italic>\n                    &lt; .0001;\n                    <jats:italic>k<\/jats:italic>\n                    \u2009=\u200960,\n                    <jats:italic>n<\/jats:italic>\n                    <jats:sub>\n                      <jats:italic>ES<\/jats:italic>\n                    <\/jats:sub>\n                    = 140). Sample age moderated broad (\n                    <jats:italic>r<\/jats:italic>\n                    = .003,\n                    <jats:italic>p<\/jats:italic>\n                    = .01) and distress (\n                    <jats:italic>r<\/jats:italic>\n                    = .004,\n                    <jats:italic>p<\/jats:italic>\n                    = .04) recognition deficits, such that effects diminished with sample age. These results are consistent with theoretical models proposing emotional hyporeactivity represents a developmentally stable correlate of CU traits that may reduce intrinsic motivation for emotion recognition early in development. Such developmental changes also have implications for improving treatments for individuals with elevated CU traits.\n                  <\/jats:p>","DOI":"10.1007\/s10567-026-00586-2","type":"journal-article","created":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T06:46:29Z","timestamp":1791269189000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Multilevel Meta-analyses of Emotional Processing Deficits Associated with Callous-Unemotional (CU) Traits: Do They Differ by Age and Sex?"],"prefix":"10.1007","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2008-7938","authenticated-orcid":false,"given":"Emily C.","family":"Kemp","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paul J.","family":"Frick","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Taylor A.","family":"Miller","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Julianne S.","family":"Speck","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"David J.","family":"Gertz","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zeying","family":"Du","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,10,6]]},"reference":[{"key":"586_CR1","doi-asserted-by":"publisher","first-page":"2371","DOI":"10.3389\/fpsyg.2019.02371","volume":"10","author":"L Abbruzzese","year":"2019","unstructured":"Abbruzzese, L., Magnani, N., Robertson, I. 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