{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,15]],"date-time":"2026-07-15T18:06:22Z","timestamp":1784138782904,"version":"3.55.0"},"reference-count":35,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2025,6,10]],"date-time":"2025-06-10T00:00:00Z","timestamp":1749513600000},"content-version":"vor","delay-in-days":9,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Brain and Behavior"],"published-print":{"date-parts":[[2025,6]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    Nomophobia, or the anxiety of being separated from one's mobile phone, is an emerging psychological condition in our digital age. The 20\u2010item Nomophobia Questionnaire (NMP\u2010Q) was developed to assess nomophobia symptoms. This study utilized item response theory (IRT) and classical test theory (CTT) methods to evaluate the NMP\u2010Q's psychometric properties. Data were collected from 5087 adults who completed the NMP\u2010Q. The CTT analyses included the computation of correlation coefficients, including McDonald's\n                    <jats:italic>\u03c9<\/jats:italic>\n                    , Cronbach's\n                    <jats:italic>\u03b1<\/jats:italic>\n                    , Guttman's\n                    <jats:italic>\u03bb<\/jats:italic>\n                    2, Guttman's\n                    <jats:italic>\u03bb<\/jats:italic>\n                    6, greatest lower bound, average interitem correlation, Feldt\u2013Gilmer coefficient, Feldt\u2013Brennan coefficient, and Raju's\n                    <jats:italic>\u03b2<\/jats:italic>\n                    . IRT analyses included graded response modeling of items, test information function, differential item functioning, and reliability. CTT analysis revealed high reliability coefficients across nine metrics and a four\u2010factor model with good fit indices. IRT analysis showed a strong item fit to the polytomous graded model, indicating the questionnaire's robustness. Based on IRT (both uni\u2010 and multidimensional IRT) analyses, we propose a 10\u2010item short version (NMP\u2010Q Short), demonstrating high correlation (\n                    <jats:italic>r<\/jats:italic>\n                    = 0.97) with the original NMP\u2010Q. Our findings provide very good support for the NMP\u2010Q's reliability and construct validity. The items displayed good discrimination and difficulty parameters. The second 10 items of the NMP\u2010Q appeared to be the most informative. The proposed NMP\u2010Q Short offers a valuable option for efficient\/rapid and accurate screening. However, additional validation and sensitivity testing are warranted to further establish its usefulness.\n                  <\/jats:p>","DOI":"10.1002\/brb3.70622","type":"journal-article","created":{"date-parts":[[2025,6,11]],"date-time":"2025-06-11T02:39:42Z","timestamp":1749609582000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["The Validation of the Nomophobia Questionnaire Using a Modern Psychometric Approach: An Item Response Theory Analysis of 5087 Participants"],"prefix":"10.1002","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8990-1320","authenticated-orcid":false,"given":"Haitham","family":"Jahrami","sequence":"first","affiliation":[{"name":"Government Hospitals Manama Bahrain"},{"name":"Department of Psychiatry, College of Medicine and Health Sciences Arabian Gulf University Manama Bahrain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2623-9557","authenticated-orcid":false,"given":"Khaled","family":"Trabelsi","sequence":"additional","affiliation":[{"name":"High Institute of Sport and Physical Education of Sfax University of Sfax Sfax Tunisia"},{"name":"Department of Movement Sciences and Sports Training, School of Sport Science the University of Jordan Amman Jordan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Achraf","family":"Ammar","sequence":"additional","affiliation":[{"name":"Department of Training and Movement Science, Institute of Sport Science Johannes Gutenberg\u2010University Mainz Mainz Germany"},{"name":"Research Laboratory, Molecular Bases of Human Pathology, LR19ES13, Faculty of Medicine of Sfax University of Sfax Sfax Tunisia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8409-868X","authenticated-orcid":false,"given":"Nicola Luigi","family":"Bragazzi","sequence":"additional","affiliation":[{"name":"Human Nutrition Unit Department of Food and Drugs University of Parma Parma Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3045-4153","authenticated-orcid":false,"given":"Hadeel","family":"Ghazzawi","sequence":"additional","affiliation":[{"name":"Nutrition and Food Technology Department, School of Agriculture the University of Jordan Amman Jordan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Waqar","family":"Husain","sequence":"additional","affiliation":[{"name":"Department of Humanities, Islamabad Campus COMSATS University Islamabad Islamabad Pakistan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6668-2874","authenticated-orcid":false,"given":"Maha M.","family":"AlRasheed","sequence":"additional","affiliation":[{"name":"Clinical Pharmacy Department, College of Pharmacy King Saud University Riyadh Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8686-7259","authenticated-orcid":false,"given":"Seithikurippu R.","family":"Pandi\u2010Perumal","sequence":"additional","affiliation":[{"name":"Centre for Research and Development Chandigarh University Mohali India"},{"name":"Division of Research and Development Lovely Professional University Phagwara India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8798-5345","authenticated-orcid":false,"given":"Amir","family":"Pakpour","sequence":"additional","affiliation":[{"name":"Department of Nursing, School of Health and Welfare J\u00f6nk\u00f6ping University J\u00f6nk\u00f6ping Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2749-3274","authenticated-orcid":false,"given":"Zahra","family":"Saif","sequence":"additional","affiliation":[{"name":"Government Hospitals Manama Bahrain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9776-0473","authenticated-orcid":false,"given":"Michael V.","family":"Vitiello","sequence":"additional","affiliation":[{"name":"Department of Psychiatry &amp; 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