Analyzing human aspects in software development A systematic mapping study -- Effects of Debriefing in Computer-Supported Collaborative Learning Pyramid Scripts with open-ended task -- The Effect of Pair Programming on Code Maintainability -- Relevant Knowledge Use During Collaborative Explanation Activities: Investigation by Laboratory Experiment, and Computer Simulation Using ACT-R -- Does volunteer engagement pay off? An analysis of user participation in online Citizen Science projects -- Effects of Digital Avatar Robots on perceived social presence and copresence in business meetings between the managers and their coworkers -- Presentation Method for Conveying Nonverbal Information in Online Conference Presentations with a Virtual Stage -- Kano Model-Based Macro and Micro Shift in Feature Perception of Short-Term Online Courses -- Glow-mind: an input/output web system for sharing feelings by pressing a button -- Support by Visually Impaired: A Proposal for a System to Present Walkability on Maps Using White Cane Data -- How Teacher Education Students Collaborate when Solving an Asymmetric Digital Task -- Using process mining techniques to discover the collective behaviour of educators in a learning community platform -- Collaborative Community Knowledge Building with Personalized Question Recommendations -- Evaluating an adaptive intervention in collaboration scripts deconstructing body image narratives in a social media educational platform -- Students' basic psychological needs satisfaction at the interface level of a computer-supported collaborative learning tool -- Facilitator Agent to Support Low-resource Language Speakers In MT Mediated Communication -- Towards Implementing Collaborative Learning in Remote Teaching Scenarios -- Scaffolding of Intuitionist Ethical Reasoning with Groupware: Do students' stances change in different countries? -- Development of Toys for Determining Behavioral Imitation during Parent-Child Interactions -- Estimating peer evaluation potential by utilizing learner model during group work -- Scenario for analysing student interactions and orchestration load in collaborative and hybrid learning environments -- Implicit HCI for Geocollaborative Hyperstories Creation.

This volume constitutes the proceedings of the 28th International Conference on Collaboration Technologies and Social Computing, CollabTech 2022, held in Santiago, Chile during November 8-11, 2022. The 18 full and 4 work-in-process papers presented in this volume were selected from 37 submissions and underwent careful double-blind peer review. The papers focus on innovative technical, human and organizational approaches to expand collaboration support including computer science, management science, design science, cognitive and social science.