Wafa Johal

schoolUniversity of Melbournebar_chart#1759 Global Rank

Total Papers

HCI Rank

#1759

Research Areas

Years Active

Recent Publications

Modelling Visuo-Haptic Perception Change in Size Estimation Tasks

Tangible interactions involve multiple sensory cues, enabling the accurate perception of object properties, such as size. Research has shown, however, that if we decouple these cues (for example, by altering the visual cue), then the resulting discrepancies present new opportunities for interactions. Perception over t…

CHI '26CorrespondingHonorable MentionHuman-Robot Collaboration (HRC) +1

Oops, I Did It Again (But I Know It): Robot Failure Consistency and Awareness in Human-Robot Collaboration

In human–robot collaboration, repeated failures are inevitable and can undermine trust and perceptions of robot intelligence. While some failures severely disrupt tasks and others are relatively benign, their cumulative impact on trust is not clearly understood. We investigated whether users perceive repeated failures…

DIS '25CorrespondingSocial Robot Interaction +1

"I can feel the risks by looking at the robot face": Communicating Risk through a Physical Agent

Risk communication is essential for shaping public understanding and encouraging action in response to hazards. We investigate the potential of physical humanlike agents as a novel visualisation interface for risk communication, given their ability to communicate emotion and visually convey information. We first condu…

CHI '252nd AuthorForce Feedback & Pseudo-Haptic Weight +2

Illusion Spaces in VR: The Interplay Between Size and Taper Angle Perception in Grasping

Leveraging the integration of visual and proprioceptive cues, research has uncovered various perception thresholds in VR that can be exploited to support haptic feedback for grasping. While previous studies have explored individual dimensions, such as size, the combined effect of multiple geometric properties on perce…

CHI '25CorrespondingAgent Personality & Anthropomorphism +2

Can you pass that tool?: Implications of Indirect Speech in Physical Human-Robot Collaboration

Indirect speech acts (ISAs) are a natural pragmatic feature of human communication, allowing requests to be conveyed implicitly while maintaining subtlety and flexibility. Although advancements in speech recognition have enabled natural language interactions with robots through direct, explicit commands—providing clar…

CHI '24CorrespondingAI-Assisted Decision-Making & Automation +2

Robot-Assisted Decision-Making: Unveiling the Role of Uncertainty Visualisation and Embodiment

Robots are embodied agents that act under several sources of uncertainty. When assisting humans in a collaborative task, robots need to communicate their uncertainty to help inform decisions. In this study, we examine the use of visualising a robot’s uncertainty in a high-stakes assisted decision-making task. In parti…

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