{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,7]],"date-time":"2026-04-07T13:09:04Z","timestamp":1775567344156,"version":"3.50.1"},"reference-count":29,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2026,3,25]],"date-time":"2026-03-25T00:00:00Z","timestamp":1774396800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"University of Dhaka, Bangladesh","award":["56.00.0000.052.33.002.23-28"],"award-info":[{"award-number":["56.00.0000.052.33.002.23-28"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Robotics"],"abstract":"<jats:p>Autism Spectrum Disorder (ASD) is defined by ongoing difficulties in social communication, flexibility in behavior, and adaptive learning skills. Interventions that utilize robots have demonstrated potential in providing organized training for children with ASD; however, there is a lack of controlled studies that specifically examine the effects of reinforcement strategies. This research introduces a systematic interaction policy based on reinforcement, founded on the principles of Applied Behavior Analysis (ABA), and assesses its effectiveness through a randomized controlled experimental design with observation. The humanoid robot NAO was used in two different interaction scenarios, one involving a reinforcement condition (RC) and the other a non-reinforcement condition (RC), ensuring that the instructional material and environment were maintained, while only the availability of contingent positive feedback was altered. A total of 50 participants diagnosed with ASD Level 2 engaged in structured word-learning sessions. Learning outcomes were assessed using institutional performance criteria, average response time, and emotion analysis derived from a CNN-based facial expression model. Independent samples t-tests revealed statistically significant improvements in both performance scores (t(48) = 3.779, p &lt; 0.05) and response times (t(48) = 3.758, p &lt; 0.05) in the reinforcement condition compared to the non-reinforcement condition. The findings demonstrate that structured ABA-based reinforcement within robotic interaction significantly enhances learning efficiency and task engagement, contributing methodologically rigorous evidence to robot-assisted ASD intervention research.<\/jats:p>","DOI":"10.3390\/robotics15040066","type":"journal-article","created":{"date-parts":[[2026,3,26]],"date-time":"2026-03-26T15:10:24Z","timestamp":1774537824000},"page":"66","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Reinforcement-Based Person-Specific Training for Children with Autism Using a Humanoid Robot NAO"],"prefix":"10.3390","volume":"15","author":[{"given":"Masud","family":"Karim","sequence":"first","affiliation":[{"name":"Department of Computer Science and Engineering, University of Dhaka, Dhaka 1000, Bangladesh"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6564-7401","authenticated-orcid":false,"given":"Md. Solaiman","family":"Mia","sequence":"additional","affiliation":[{"name":"Department of Computer Science and Engineering, Green University of Bangladesh, Narayanganj 1461, Bangladesh"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Saifuddin Md.","family":"Tareeq","sequence":"additional","affiliation":[{"name":"Department of Computer Science and Engineering, University of Dhaka, Dhaka 1000, Bangladesh"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Md.","family":"Hasanuzzaman","sequence":"additional","affiliation":[{"name":"Department of Math and Computer Science, Southern Arkansas University, Magnolia, AR 71753, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2026,3,25]]},"reference":[{"key":"ref_1","unstructured":"Jabeen, S., Kalsoom, T., Nader, M., and Moazzam, M. (2021). Effect of Positive Reinforcement on Social Skills of Students with Autism Spectrum Disorder at Primary Level. Linguist. Antverp., 2430\u20132441."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Schuetze, M., Rohr, C.S., Dewey, D., McCrimmon, A., and Bray, S. (2017). Reinforcement Learning in Autism Spectrum Disorder. Front. Psychol., 8.","DOI":"10.3389\/fpsyg.2017.02035"},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Chase, J., Li, J.J., Lin, W.C., Tai, L.H., Castro, F., Collins, A.G., and Wilbrecht, L. (2025). Genetic changes linked to two different syndromic forms of autism enhance reinforcement learning in adolescent male but not female mice. bioRxiv.","DOI":"10.1101\/2025.01.15.633099"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"17","DOI":"10.5539\/jedp.v9n2p17","article-title":"The Application of AI as Reinforcement in the Intervention for Children with Autism Spectrum Disorders (ASD)","volume":"9","author":"Shi","year":"2024","journal-title":"J. Educ. Dev. Psychol."},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Karim, M., Mia, M.S., Tareeq, S.M., and Hasanuzzaman, M. (2023, January 1\u20133). Evaluate Effectiveness of NAO Robot to Train Children with Autism Spectrum Disorder (ASD). Proceedings of the 2023 IEEE 5th International Conference on Cognitive Machine Intelligence (CogMI), Atlanta, GA, USA.","DOI":"10.1109\/CogMI58952.2023.00032"},{"key":"ref_6","unstructured":"(2020). Role of Positive Reinforcement to the Social Skills of Children with Autism Spectrum Disorder (Standard No. ISO 9001:2015)."},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Hashim, H.U., Yunus, M.M., and Norman, H. (2022). Autism Children and English Vocabulary Learning: A Qualitative Inquiry of the Challenges They Face in Their English Vocabulary Learning Journey. Children, 9.","DOI":"10.3390\/children9050628"},{"key":"ref_8","unstructured":"Khowaja, K., Al-Thani, D., and Salim, S.S. (2018, January 4\u20135). Vocabulary Learning of Children with Autism Spectrum Disorder (ASD): From the Development to an Evaluation of Serious Game Prototype. Proceedings of the Ecgbl 2018 12th European Conference on Game-Based Learning, Sophia Antipolis, France."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"146","DOI":"10.1177\/0022466908329825","article-title":"Individual Education Plan Goals and Services for Adolescents with Autism: Impact of Age and Educational Setting","volume":"44","author":"Kurth","year":"2010","journal-title":"J. Spec. Educ."},{"key":"ref_10","unstructured":"(2025, December 01). Available online: https:\/\/www.special.pcacschool.com."},{"key":"ref_11","unstructured":"(2025, November 10). Available online: https:\/\/aldebaran.com\/support\/kb\/nao6\/downloads\/nao6-software-downloads\/."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"eaat7544","DOI":"10.1126\/scirobotics.aat7544","article-title":"Improving social skills in children with ASD using a long-term, in-home social robot","volume":"3","author":"Scassellati","year":"2018","journal-title":"Sci. Robot."},{"key":"ref_13","unstructured":"(2025, December 01). Available online: https:\/\/www.softbankrobotics.com."},{"key":"ref_14","doi-asserted-by":"crossref","unstructured":"Askari, F., Feng, H., Sweeny, T.D., and Mahoor, M.H. (2018, January 27\u201331). A Pilot Study on Facial Expression Recognition Ability of Autistic Children Using Ryan, A Rear-Projected Humanoid Robot. Proceedings of the 2018 27th IEEE International Symposium on Robot and Human Interactive Communication (RO-MAN), Nanjing, China.","DOI":"10.1109\/ROMAN.2018.8525825"},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Jeon, M., Zhang, R., Lehman, W., Fakhrhosseini, S., Barnes, J., and Park, C.H. (2015). Development and Evaluation of Emotional Robots for Children with Autism Spectrum Disorders. HCI International 2015\u2014Posters\u2019 Extended Abstracts, Springer.","DOI":"10.1007\/978-3-319-21380-4_63"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"179","DOI":"10.1007\/s12369-017-0461-4","article-title":"Human\u2013Robot Facial Expression Reciprocal Interaction Platform: Case Studies on Children with Autism","volume":"10","author":"Pour","year":"2018","journal-title":"Int. J. Soc. Robot."},{"key":"ref_17","doi-asserted-by":"crossref","unstructured":"Qiu, L., and Zhai, J. (2024). A hybrid CNN-SVM model for enhanced autism diagnosis. PLoS ONE, 19.","DOI":"10.1371\/journal.pone.0302236"},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Alsaidi, M., Obeid, N., Al-Madi, N., Hiary, H., and Aljarah, I. (2024). A Convolutional Deep Neural Network Approach to Predict Autism Spectrum Disorder Based on Eye-Tracking Scan Paths. Information, 15.","DOI":"10.3390\/info15030133"},{"key":"ref_19","unstructured":"(2025, January 09). Available online: https:\/\/ml.cms.waikato.ac.nz\/weka."},{"key":"ref_20","doi-asserted-by":"crossref","unstructured":"Burns, R.B., Seifi, H., Lee, H., and Kuchenbecker, K.J. (2021, January 8\u201311). A Haptic Empathetic Robot Animal for Children with Autism. Proceedings of the Companion of the 2021 ACM\/IEEE International Conference on Human-Robot Interaction, Boulder, CO, USA.","DOI":"10.1145\/3434074.3446352"},{"key":"ref_21","doi-asserted-by":"crossref","unstructured":"Rudovic, O., Lee, J., Mascarell-Maricic, L., Schuller, B.W., and Picard, R.W. (2017). Measuring Engagement in Robot-Assisted Autism Therapy: A Cross-Cultural Study. Front. Robot. AI, 4.","DOI":"10.3389\/frobt.2017.00036"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"67","DOI":"10.1007\/s12369-020-00639-8","article-title":"Personalized Robot Interventions for Autistic Children: An Automated Methodology for Attention Assessment","volume":"13","author":"Alnajjar","year":"2021","journal-title":"Int. J. Soc. Robot."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"1125","DOI":"10.1007\/s12369-020-00704-2","article-title":"A Close Look at the Imitation Performance of Children with Autism and Typically Developing Children Using a Robotic System","volume":"13","author":"Taheri","year":"2020","journal-title":"Int. J. Soc. Robot."},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"Kumazaki, H., Warren, Z., Swanson, A., Yoshikawa, Y., Matsumoto, Y., Takahashi, H., Sarkar, N., Ishiguro, H., Mimura, M., and Minabe, Y. (2018). Can Robotic Systems Promote Self-Disclosure in Adolescents with Autism Spectrum Disorder? A Pilot Study. Front. Psychiatry, 9.","DOI":"10.3389\/fpsyt.2018.00036"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"1038","DOI":"10.1007\/s10803-012-1645-2","article-title":"Social Robots as Embedded Reinforcers of Social Behavior in Children with Autism","volume":"43","author":"Kim","year":"2013","journal-title":"J. Autism Dev. Disord."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"46","DOI":"10.1186\/s13229-018-0230-8","article-title":"The impact of robotic intervention on joint attention in Children with Autism spectrum disorders","volume":"9","author":"Kumazaki","year":"2018","journal-title":"Mol. Autism"},{"key":"ref_27","unstructured":"Talaei-Khoei, A., Lewis, L., Kaul, M., Daniel, J., and Sharma, R. (2017, January 10\u201312). Use of Lean Robotic Communication to Improve Social Response of Children with Autism. Proceedings of the Twenty-Third Americas Conference on Information Systems, Boston, MA, USA."},{"key":"ref_28","doi-asserted-by":"crossref","unstructured":"Suzuki, R., Lee, J., and Rudovic, O. (2017, January 6\u20139). NAO-Dance Therapy for Children with ASD. Proceedings of the Companion of the 2017 ACM\/IEEE International Conference on Human-Robot Interaction, Vienna, Austria.","DOI":"10.1145\/3029798.3038354"},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"113","DOI":"10.1007\/s10803-015-2556-9","article-title":"Children with Autism Spectrum Disorders Make a Fruit Salad with Probo, the Social Robot: An Interaction Study","volume":"46","author":"Simut","year":"2015","journal-title":"J. Autism Dev. 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