Artificial intelligence in HCI Helmut Degen Stavroula Ntoa editors ; Part 2 This double volume book set constitutes the refereed proceedings of 4th International Conference AI HCI 2023 held as part of the 25th International Conference HCI International 2023 which was held virtually in Copenhagen Denmark in July 2023. The total of 1578 papers and 396 posters included in the HCII 2023 proceedings was carefully reviewed and selected from 7472 submissions. The first volume focuses on topics related to Human Centered Artificial Intelligence explainability transparency and trustworthiness ethics and fairness as well as AI supported user experience design. The second volume focuses on topics related to AI for language text and speech related tasks human AI collaboration AI for decision support and perception analysis and innovations in AI enabled systems