{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,4]],"date-time":"2026-06-04T14:31:28Z","timestamp":1780583488911,"version":"3.54.1"},"reference-count":49,"publisher":"MDPI AG","issue":"24","license":[{"start":{"date-parts":[[2022,12,14]],"date-time":"2022-12-14T00:00:00Z","timestamp":1670976000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJERPH"],"abstract":"<jats:p>Gratitude is a promising resource from a healthy organizational perspective. It is related to many positive outcomes at work. The Gratitude Resentment and Appreciation Test-Revised Short (GRAT-RS) is the most widely used self-report questionnaire to detect gratitude. The present study examined GRAT-RS (the Italian version) by implementing multidimensional item response theory (MIRT) analyses to explore its psychometric properties. The participants were 537 Italian workers. Confirmatory factor analyses (CFA) of the GRAT-RS and MIRT analyses using the Grade Response Model were run. The MIRT discrimination and MIRT difficulty parameters were calculated. A test information function (TIF) and measure of reliability associated with (TIF) scores were also implemented. CFA highlighted that a bifactor model showed the best fit. Hence, MIRT analyses were carried out by implementing a bifactor model. The MIRT bifactor structure showed a good data fit with discrimination parameters ranging from good to excellent and adequate reliability. The good psychometric properties of GRAT-RS were confirmed, highlighting the questionnaire as a reliable tool to measure gratitude in Italian workers.<\/jats:p>","DOI":"10.3390\/ijerph192416786","type":"journal-article","created":{"date-parts":[[2022,12,14]],"date-time":"2022-12-14T05:27:23Z","timestamp":1670995643000},"page":"16786","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["The Gratitude Resentment and Appreciation Test-Revised Short (GRAT-RS): A Multidimensional Item Response Theory Analysis in Italian Workers"],"prefix":"10.3390","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5183-6113","authenticated-orcid":false,"given":"Andrea","family":"Svicher","sequence":"first","affiliation":[{"name":"Department of Education, Languages, Intercultures, Literatures and Psychology, (Psychology Section), University of Florence, 50135 Florence, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7970-2376","authenticated-orcid":false,"given":"Letizia","family":"Palazzeschi","sequence":"additional","affiliation":[{"name":"Department of Education, Languages, Intercultures, Literatures and Psychology, (Psychology Section), University of Florence, 50135 Florence, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6867-2319","authenticated-orcid":false,"given":"Alessio","family":"Gori","sequence":"additional","affiliation":[{"name":"Department of Health Sciences (Psychology Section), University of Florence, 50135 Florence, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5150-1273","authenticated-orcid":false,"given":"Annamaria","family":"Di Fabio","sequence":"additional","affiliation":[{"name":"Department of Education, Languages, Intercultures, Literatures and Psychology, (Psychology Section), University of Florence, 50135 Florence, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,12,14]]},"reference":[{"key":"ref_1","unstructured":"Snyder, C.R., and Lopez, S.J. 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