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In recent decades, there has been an increasing inclusion of children with developmental problems in mainstream schools. However, both the research on the implementation and effectiveness of evidence-based teacher-mediated interventions, as well as the actual implementation of these interventions in practice, remain limited. The Incredible Years - Helping Preschool Children with Autism (IY-HPCA\n                      <jats:sup>\u00ae<\/jats:sup>\n                      ) program is designed for teachers of children aged 2\u20135 years, offering strategies to promote language development, social interaction, emotional literacy and self-regulation skills. To date, no scientific studies have evaluated the feasibility or effectiveness of delivering the IY-HPCA\n                      <jats:sup>\u00ae<\/jats:sup>\n                      program. This pilot study aims to assess the feasibility of implementing this program within the public education and health systems, and to preliminarily explore its effectiveness on teaching strategies, teacher self-efficacy, and burnout.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>We will conduct a pragmatic pilot, randomized, controlled, parallel-group exploratory trial recruiting approximately 40 teachers of preschool children aged 2.11\u20135.11 years working at mainstream schools in the Barcelona region. Participants will be randomly allocated to the intervention or control group in a 1:1 ratio. The intervention will consist of six weekly sessions and will be delivered by clinical psychologists and child psychiatrists at Sant Joan de D\u00e9u Hospital (Barcelona). Primary feasibility outcomes include recruitment rates, attendance, intervention fidelity, and participant satisfaction. Secondary outcomes assessing preliminary effectiveness include teachers\u2019 use of strategies, self-efficacy, and burnout, measured using validated questionnaires. Additionally, semi-structured interviews with participating teachers and group leaders will explore their experiences with the program.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Discussion<\/jats:title>\n                    <jats:p>\n                      This study will provide pioneering preliminary data on the implementation of the IY-HPCA\n                      <jats:sup>\u00ae<\/jats:sup>\n                      program for teachers of preschool children with autism. The results will inform the feasibility and potential effectiveness of this intervention, guiding future larger-scale trials of implementing the program within the public educational and health systems.\n                    <\/jats:p>\n                    <jats:p>\n                      <jats:italic>Trial registration:\u00a0<\/jats:italic>\n                      ClinicalTrials.gov.\u00a0NCT06790199,\u00a0date of registration: first submitted 2025-01-17; first posted 2025-01-23,\u00a0URL of trial registry record: https:\/\/clinicaltrials.gov\/study\/NCT06790199\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1007\/s44202-026-00862-w","type":"journal-article","created":{"date-parts":[[2026,8,22]],"date-time":"2026-08-22T04:55:39Z","timestamp":1787374539000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Protocol for a feasibility randomized controlled pilot trial evaluating a teacher program to support preschool children with autism and language delay"],"prefix":"10.1007","volume":"6","clinical-trial-number":[{"clinical-trial-number":"nct06790199","registry":"10.18810\/clinical-trials-gov"}],"author":[{"given":"Marta","family":"Llorens","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maria","family":"Elias","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Laura","family":"Gonz\u00e1lez-Riesco","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mercedes","family":"Serrano","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anna","family":"Gin\u00e9","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4235-0810","authenticated-orcid":false,"given":"Helena","family":"Vall-Roqu\u00e9","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Laia","family":"Villalta","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,8,22]]},"reference":[{"issue":"5","key":"862_CR1","doi-asserted-by":"publisher","first-page":"778","DOI":"10.1002\/aur.2696","volume":"15","author":"J Zeidan","year":"2022","unstructured":"Zeidan J, Fombonne E, Scorah J, Ibrahim A, Durkin MS, Saxena S, et al. 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The study will be conducted in accordance with the Declaration of Helsinki, Good Clinical Practice guidelines, and all applicable regulatory requirements.","order":1,"name":"Ethics","label":"Ethics approval and consent to participate","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"Not applicable: this manuscript does not contain data from any individual person.\u00a0We confirm that we have read the Journal\u2019s position on issues involved in ethical publication and affirm that this report is consistent with those guidelines.","order":2,"name":"Ethics","label":"Consent for publication","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"The authors declare no competing interests.\u00a0All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2000. Informed consent was obtained from all participants.","order":3,"name":"Ethics","label":"Competing interests","group":{"name":"EthicsHeading","label":"Declarations"}}],"article-number":"243"}}