FIXical I/O: Exploring the Effects of Real-time Error Sensing and Physical Intervention on Finger-based Motor Sequence LearningDexterous finger movements are critical for both everyday and specialized tasks. However, acquiring such skills is challenging, as it requires accurate sequence memory and fine finger coordination. Existing haptic training systems typically employ demonstration feedback, which physically guides correct movements, or p…2026KLKyungyeon Lee et al.University Of MarylandForce Feedback & Pseudo-Haptic WeightHaptic WearablesVibrotactile Feedback & Skin StimulationCHI
NeuResonance: Exploring Feedback Experiences for Fostering the Inter-brain SynchronizationWhen several individuals collaborate on a shared task, their brain activities often synchronize. This phenomenon, known as Inter-brain Synchronization (IBS), is notable for inducing prosocial outcomes such as enhanced interpersonal feelings, including closeness, trust, empathy, and more. Further strengthening the IBS…2025JDJamie Ngoc Dinh et al.University Of MarylandMid-Air Haptics (Ultrasonic)Vibrotactile Feedback & Skin StimulationBrain-Computer Interface (BCI) & NeurofeedbackCHI
Hapticus: Exploring the Effects of Haptic Feedback and its Customization on Motor Skill Learning: Tactile, Haptic, and Somatosensory ApproachesNumerous haptic devices have been proposed to support motor learning, such as a hand exoskeleton with mechanical linkages, a vibrotactile glove, and an Electrical Muscle Stimulation (EMS) device. Understanding the impact of each type of feedback on users’ learning performance and experience, as well as the effects of…2025KLKyungyeon Lee et al.University Of MarylandIn-Vehicle Haptic, Audio & Multimodal FeedbackForce Feedback & Pseudo-Haptic WeightElectrical Muscle Stimulation (EMS)CHI
DexteriSync: A Hand Thermal I/O Exoskeleton for Morphing Finger Dexterity ExperienceSkin temperature is an important physiological factor for human hand dexterity. Leveraging this feature, we engineered an exoskeleton, called DexteriSync, that can dynamically adjust the user's finger dexterity and induce different thermal perceptions by modulating finger skin temperature. This exoskeleton comprises f…2024XSXiming Shen et al.Keio UniversityHaptic WearablesMotor Impairment Assistive Input TechnologiesUIST
JetUnit: Rendering Diverse Force Feedback in Virtual Reality Using Water JetsWe propose JetUnit, a water-based VR haptic system designed to produce force feedback with a wide spectrum of intensities and frequencies through water jets. The key challenge in designing this system lies in optimizing parameters to enable the haptic device to generate force feedback that closely replicates the most…2024ZZZining Zhang et al.University Of MarylandForce Feedback & Pseudo-Haptic WeightFull-Body Interaction & Embodied InputUIST
Morphing Identity: Exploring Self-Other Identity Continuum through Interpersonal Facial Morphing ExperienceWe explored continuous changes in self-other identity by designing an interpersonal facial morphing experience where the facial images of two users are blended and then swapped over time. Both users' facial images are displayed side by side, with each user controlling their own morphing facial images, allowing us to c…2023KSKye Shimizu et al.SonyIdentity & Avatars in XRInteractive Narrative & Immersive StorytellingCHI
DigituSync: A Dual-User Passive Exoskeleton Glove That Adaptively Shares Hand GesturesWe engineered DigituSync, a passive-exoskeleton that physically links two hands together, enabling two users to adaptively transmit finger movements in real-time. It uses multiple four-bar linkages to transfer both motion and force, while still preserving congruent haptic feedback. Moreover, we implemented a variable-…2022JNJun Nishida et al.JSPSForce Feedback & Pseudo-Haptic WeightHaptic WearablesUIST
Electrical Head Actuation: Enabling Interactive Systems to Directly Manipulate Head OrientationWe propose a novel interface concept in which interactive systems directly manipulate the user’s head orientation. We implement this using electrical-muscle-stimulation (EMS) of the neck muscles, which turns the head around its yaw (left/right) and pitch (up/down) axis. As the first exploration of EMS for head actuati…2022YTYudai Tanaka et al.University of ChicagoElectrical Muscle Stimulation (EMS)Human Pose & Activity RecognitionBrain-Computer Interface (BCI) & NeurofeedbackCHI
Stereo-Smell via Electrical Trigeminal StimulationWe propose a novel type of olfactory device that creates a stereo-smell experience, i.e., directional information about the location of an odor, by rendering the readings of external odor sensors as trigeminal sensations using electrical stimulation of the user’s nasal septum. The key is that the sensations from the t…2021JBJas Brooks et al.University of ChicagoElectrical Muscle Stimulation (EMS)Biosensors & Physiological MonitoringCHI
Preserving Agency During Electrical Muscle Stimulation Training Speeds up Reaction Time Directly After Removing EMSForce feedback devices, such as motor-based exoskeletons or wearables based on electrical muscle stimulation (EMS), have the unique potential to accelerate users’ own reaction time (RT). However, this speedup has only been explored while the device is attached to the user. In fact, very little is known regarding wheth…2021SKShunichi Kasahara et al.SonyVibrotactile Feedback & Skin StimulationElectrical Muscle Stimulation (EMS)CHI
HandMorph: a Passive Exoskeleton that Miniaturizes GraspWe engineered an exoskeleton, which we call HandMorph, that approximates the experience of having a smaller grasping range. It uses mechanical links to transmit motion from the wearer’s fingers to a smaller hand with five anatomically correct fingers. The result is that HandMorph miniaturizes a wearer’s grasping range…2020JNJun Nishida et al.JSPSShape-Changing Interfaces & Soft Robotic MaterialsHand Gesture RecognitionUIST
Next Steps for Human-Computer IntegrationHuman-Computer Integration (HInt) is an emerging paradigm in which computational and human systems are closely interwoven. Integrating computers with the human body is not new. however, we believe that with rapid technological advancements, increasing real-world deployments, and growing ethical and societal implicatio…2020FMFlorian Floyd Mueller et al.Monash UniversityBrain-Computer Interface (BCI) & NeurofeedbackTechnology Ethics & Critical HCIUser Research Methods (Interviews, Surveys, Observation)CHI
Preemptive Action: Accelerating Human Reaction using Electrical Muscle Stimulation Without Compromising AgencyWe enable preemptive force-feedback systems to speed up human reaction time without fully compromising the user's sense of agency. Typically these interfaces actuate by means of electrical muscle stimulation (EMS) or mechanical actuators; they preemptively move the user to perform a task, such as to improve movement p…2019SKShunichi Kasahara et al.SonyForce Feedback & Pseudo-Haptic WeightElectrical Muscle Stimulation (EMS)CHI
Egocentric Smaller-person Experience through a Change in Visual PerspectiveThis paper explores how human perceptions, actions, and interactions can be changed through an embodied and active experience of being a smaller person in a real-world environment, which we call an egocentric smaller person experience. We developed a wearable visual translator that provides the perspective of a smalle…2019JNJun Nishida et al.JSPSFull-Body Interaction & Embodied InputEye Tracking & Gaze InteractionIdentity & Avatars in XRCHI