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Using functional Near-Infrared Spectroscopy in HCI



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Using functional Near Infrared Spectroscopy in HCI Toward evaluation methods and adaptive interfaces Audrey Girouard Leanne M Hirshfield Erin Solovey Robert J K Jacob Computer Science Department Tufts University Medford MA 02155 audrey girouard leanne hirshfield erin solovey robert jacob tufts edu ABSTRACT Functional Near Infrared Spectroscopy fNIRS is a new brain imaging tool that shows potential for use in the field of human computer interaction HCI because of its lightweight non invasive qualities fNIRS could become an additional input to interfaces by recording the user s mental state through the measure of blood flow in the brain However before we are able to use the tool at its full potential we must test its feasibility in HCI and develop methods to accurately analyze the output This paper will introduce fNIRS and briefly discuss a feasibility study conducted to explore the measurement of different levels of workload Finally we will present future research directions that follow from this work such as evaluating new interaction styles according to the measured mental workload adaptive interfaces with fNIRS and combining fNIRS with EEG Author Keywords brain computer interfaces BCI workload fNIRS interaction styles EEG ACM Classification Keywords H 5 2 Information Interfaces and Presentation User Interfaces H 1 2 Models and Principles User Machine Systems human factors INTRODUCTION Acquiring measurements about the mental state of a computer user would be valuable in human computer interaction HCI both for evaluation of interfaces and for real time input to computer systems Although we can accurately measure task completion time and accuracy factors such as mental workload frustration and distraction are typically limited to qualitative observations or subjective surveys These surveys are often taken after the completion of a task potentially missing valuable insight into the user s changing experience throughout the task New evaluation techniques that monitor



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