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Assessment of LOC is highly relevant within psychological research and social sciences. The aim of the current study was to evaluate the screening tool in a large representative sample, with special focus on its dimensionality and the presence of acquiescence bias. The current sample (\n                    <jats:italic>N<\/jats:italic>\n                    = 2522; Age: M = 48.50 years (\n                    <jats:italic>SD<\/jats:italic>\n                    = 17.75); 50.1% female) was representative for the German adult population with respect to gender, age, and education. After conducting a CFA including an uncorrelated method factor, model fit indices generally indicated a good fit. Additionally, we found evidence of good reliability. Results from this study suggest that the IE-4 is best considered as a unifactorial measure when accounting for acquiescence bias.\n                  <\/jats:p>","DOI":"10.1186\/s40359-026-05101-4","type":"journal-article","created":{"date-parts":[[2026,7,4]],"date-time":"2026-07-04T02:54:17Z","timestamp":1783133657000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Psychometricre-evaluation of the locus of control short scale (IE-4) in the German general population: evidence of acquiescence bias"],"prefix":"10.1186","volume":"14","author":[{"given":"Katja","family":"Petrowski","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Julian","family":"Duhm","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vanessa","family":"Renner","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bjarne","family":"Schmalbach","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bernhard","family":"Strau\u00df","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Elmar","family":"Br\u00e4hler","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,7,4]]},"reference":[{"issue":"8","key":"5101_CR1","doi-asserted-by":"publisher","first-page":"476","DOI":"10.1136\/jech.52.8.476","volume":"52","author":"OS Dalgard","year":"1998","unstructured":"Dalgard OS, H\u00e5heim LL. 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