This book constitutes selected papers of the Fourth International Conference on Computer-Human Interaction Research and Applications, CHIRA 2020, held virtually, in November 2020.The 8 full papers presented in this book were carefully reviewed and selected from 44 submissions.

Cognitive Control: Transitions in Control Modes under Different Level of Workload and fNIRS Sensitivity.- Eyetracking Nutritional Behaviour and Choices.- Reshaping Thinking for Shape-shifting Technology: Adapting a MAS Agent Design to Encourage User Engagement.- Learning Tonal Harmony through Augmented Reality: Bridging the Gap between Music Embodiment and Digital Experiences.- The Telerobot Contact Hypothesis.- Boggle: An SSVEP-based BCI Web Browser.- Exploring a Cognitive Interface to Support Trust and Acceptability of Future Users of Autonomous Vehicles.- Visualizing Critical Objectives in Omnichannel Management through Mental Models: The Application of an Assortment Integration Context.