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The paucity of proper measurement tools that sensitively and accurately assess behaviors has been one limiting factor in the improved knowledge of these children. Short of creating and validating a new measurement tool for this subpopulation, this study took an alternative and more immediate approach: conduct a secondary data analysis and examine an existing social communication measure, the Early Social Communication Scales (ESCS), with item response theory. The final sample consisted of 453 minimally verbal children culled from four different completed studies. The IRT models analyzed the frequency of social communication gestures from the ESCS and returned an objective difficulty hierarchy regarding initiations of joint attention and behavior regulation gestures. The best\u2010fitting and final model was a zero\u2010inflated negative binomial model (ZINBM), which determined that joint attention gestures were, on average, more difficult than behavior regulation gestures. Joint attentional shows and gives were essentially absent in the children's repertoire, and behavior regulation reaches were the easiest gestures for this sample. The ZINBM separately modeled children with some gestures and children who did not present with any gestures and determined that behavior regulation reaches and gives were likely the first gestures a child will eventually exhibit among children with no gestures. Methodological contributions and potential future applications of IRT are discussed.<\/jats:p>","DOI":"10.1002\/aur.3218","type":"journal-article","created":{"date-parts":[[2024,8,17]],"date-time":"2024-08-17T04:54:06Z","timestamp":1723870446000},"page":"1830-1843","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Characterizing social communication among minimally verbal children with autism: An application of item response theory"],"prefix":"10.1002","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2799-1014","authenticated-orcid":false,"given":"Andrew","family":"Schlink","sequence":"first","affiliation":[{"name":"Semel Institute for Neuroscience and Human Behavior University of California  Los Angeles California USA"},{"name":"UCLA Semel Institute 68\u2010268  Los Angeles California USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2266-170X","authenticated-orcid":false,"given":"Connie","family":"Kasari","sequence":"additional","affiliation":[{"name":"UCLA Semel Institute 68\u2010268  Los Angeles California USA"},{"name":"Department of Education University of California  Los Angeles California USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2024,8,16]]},"reference":[{"key":"e_1_2_11_2_1","doi-asserted-by":"publisher","DOI":"10.1002\/9781444344035.ch22"},{"key":"e_1_2_11_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/cdev.12973"},{"key":"e_1_2_11_4_1","doi-asserted-by":"publisher","DOI":"10.1080\/15374416.2016.1138407"},{"key":"e_1_2_11_5_1","doi-asserted-by":"publisher","DOI":"10.1177\/1362361314542955"},{"key":"e_1_2_11_6_1","doi-asserted-by":"publisher","DOI":"10.1037\/a0029508"},{"key":"e_1_2_11_7_1","doi-asserted-by":"publisher","DOI":"10.1177\/0033294118797577"},{"key":"e_1_2_11_8_1","volume-title":"The basics of item response theory","author":"Baker F.","year":"2001"},{"key":"e_1_2_11_9_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.2044-835X.1989.tb00793.x"},{"key":"e_1_2_11_10_1","unstructured":"Bates D. 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