6 research outputs found

    Common Fate for Animated Transitions in Visualization

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    International audienceThe Law of Common Fate from Gestalt psychology states that visual objects moving with the same velocity along parallel trajectories will be perceived by a human observer as grouped. However, the concept of common fate is much broader than mere velocity; in this paper we explore how common fate results from coordinated changes in luminance and size. We present results from a crowdsourced graphical perception study where we asked workers to make perceptual judgments on a series of trials involving four graphical objects under the influence of conflicting static and dynamic visual factors (position, size and luminance) used in conjunction. Our results yield the following rankings for visual grouping: motion > (dynamic luminance, size, luminance); dynamic size > (dynamic luminance, position); and dynamic luminance > size. We also conducted a follow-up experiment to evaluate the three dynamic visual factors in a more ecologically valid setting, using both a Gapminder-like animated scatterplot and a thematic map of election data. The results indicate that in practice the relative grouping strengths of these factors may depend on various parameters including the visualization characteristics and the underlying data. We discuss design implications for animated transitions in data visualization

    Urania: Visualizing Data Analysis Pipelines for Natural Language-Based Data Exploration

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    Exploratory Data Analysis (EDA) is an essential yet tedious process for examining a new dataset. To facilitate it, natural language interfaces (NLIs) can help people intuitively explore the dataset via data-oriented questions. However, existing NLIs primarily focus on providing accurate answers to questions, with few offering explanations or presentations of the data analysis pipeline used to uncover the answer. Such presentations are crucial for EDA as they enhance the interpretability and reliability of the answer, while also helping users understand the analysis process and derive insights. To fill this gap, we introduce Urania, a natural language interactive system that is able to visualize the data analysis pipelines used to resolve input questions. It integrates a natural language interface that allows users to explore data via questions, and a novel data-aware question decomposition algorithm that resolves each input question into a data analysis pipeline. This pipeline is visualized in the form of a datamation, with animated presentations of analysis operations and their corresponding data changes. Through two quantitative experiments and expert interviews, we demonstrated that our data-aware question decomposition algorithm outperforms the state-of-the-art technique in terms of execution accuracy, and that Urania can help people explore datasets better. In the end, we discuss the observations from the studies and the potential future works

    Optimizing Staged Transitions for Scatter Plots

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    Animación, usabilidad y experiencia de usuario en el ámbito del diseño de interfaces : una nueva propuesta taxonómica

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    El diseño visual de una aplicación tiene como principal objetivo configurar una interfaz que resulte atractiva, fácil de usar y que permita utilizar el dispositivo eficazmente. Para conseguirlo, el diseñador selecciona tipografías y elementos gráficos, define sus atributos visuales y los dispone en la pantalla de manera que la interfaz funciona como un mensaje en el que el diseñador le hace llegar al usuario la información necesaria para que pueda utilizar el dispositivo de forma satisfactoria. Durante la interacción se establece un proceso de comunicación basado en un lenguaje visual que está compuesto por estos elementos gráficos y las animaciones que controlan cómo evoluciona su apariencia a lo largo del tiempo. El objetivo general del presente trabajo es establecer cuáles son las funciones que puede desempeñar la animación como parte de ese lenguaje visual y analizar cómo ha evolucionado su uso desde las primeras interfaces gráficas de usuario hasta el momento actual..
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