Luis A. Leiva

schoolUniversity of Luxembourgbar_chart#883 Global Rank

Total Papers

HCI Rank

#883

Research Areas

Years Active

Recent Publications

SeekUI: Predicting Visual Search Behavior on Graphical User Interfaces with a Reward-Augmented Vision Language Model

Visual search is key to understanding and improving interaction with graphical user interfaces (GUIs), yet predicting scanpaths on real GUIs remains an open challenge. Unlike free-viewing, visual search is goal-driven and shaped by both linguistic and visual features of the GUI. State-of-the-art models of visual searc…

CHI '26CorrespondingHand Gesture Recognition +2

AutoChainer: Automatic Data Augmentation for Stroke-based Input

Training Deep Learning classifiers for stroke-based applications requires collecting lots of samples, which is often expensive and time-consuming. Data augmentation (DA) techniques can mitigate this issue by artificially increasing the number of training samples, eventually improving model performance and robustness.…

CHI '26CorrespondingSmart Cities & Urban Sensing +2

Pixels, Plants, and People: Affective Evaluation of Urban Green Spaces

Urban green spaces are critical for well-being, yet planners lack scalable ways to anticipate how environments will be perceived by users. We conducted an experiment with 27 participants who viewed 30 images of urban spaces while eye movements and brain activity were recorded. Image composition, parsed into 14 urban c…

IUI '255th+ AuthorGenerative AI (Text, Image, Music, Video) +1

Text-to-Image Generation for Vocabulary Learning Using the Keyword Method

The 'keyword method' is an effective technique for learning vocabulary of a foreign language. It involves creating a memorable visual link between what a word means and what its pronunciation in a foreign language sounds like in the learner's native language. However, these memorable visual links remain implicit in th…

CUI '24CorrespondingVoice User Interface (VUI) Design +1

Examining Humanness as a Metaphor to Design Voice User Interfaces

Voice User Interfaces (VUIs) increasingly leverage `humanness' as a foundational design metaphor, adopting roles like `assistants,' `teachers,' and `secretaries' to foster natural interactions. Yet, this approach can sometimes misalign user trust and reinforce societal stereotypes, leading to socio-technical challenge…

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

Artful Path to Healing: Using Machine Learning for Visual Art Recommendation to Prevent and Reduce Post-Intensive Care Syndrome (PICS)

Staying in the intensive care unit (ICU) is often traumatic, leading to post-intensive care syndrome (PICS), which encompasses physical, psychological, and cognitive impairments. Currently, there are limited interventions available for PICS. Studies indicate that exposure to visual art may help address the psychologic…

IUI '24CorrespondingVoice User Interface (VUI) Design +2

Impact of Voice Fidelity on Decision Making: A Potential Dark Pattern?

Manipulative design in user interfaces (conceptualized as dark patterns) has emerged as a significant impediment to the ethical design of technology and a threat to user agency and freedom of choice. While previous research focused on exploring these patterns in the context of graphical user interfaces, the impact of…

CHI '232nd AuthorEye Tracking & Gaze Interaction +1

UEyes: Understanding Visual Saliency across User Interface Types

While user interfaces (UIs) display elements such as images and text in a grid-based layout, UI types differ significantly in the number of elements and how they are displayed. For example, webpage designs rely heavily on images and text, whereas desktop UIs tend to feature numerous small images. To examine how such d…

CHI '23CorrespondingRecommender System UX +1

The Elements of Visual Art Recommendation: Learning Latent Semantic Representations of Paintings

Artwork recommendation is challenging because it requires understanding how users interact with highly subjective content, the complexity of the concepts embedded within the artwork, and the emotional and cognitive reflections they may trigger in users. In this paper, we focus on efficiently capturing the elements (i.…

IUI '225th+ AuthorHand Gesture Recognition +1

Robust and Deployable Gesture Recognition for Smartwatches

Gesture recognition on smartwatches is challenging not only due to resource constraints but the dynamically changing conditions of users. It is currently an open problem how to engineer gesture recognizers that are robust and yet deployable on smartwatches.Recent research has found that common everyday events, such as…

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