Incidental Visualizations: Pre-Attentive Primitive Visual Tasks

access_time February 06, 2020 at 03:30PM until February 06, 2020 at 04:30PM
place Room 418, INESC-ID (Alves Redol)

Seeing something at a glance means we can see it pre-attentively. In InfoVis design, visualizations make use of pre-attentive features to highlight specific marks, seen when we execute primitive visual tasks (tasks applied to visual marks such as dots, lines, and areas). But, studies on pre-attentive features presume that charts only allow information to be understood attentively. We argue that a complete visualization can be perceived pre-attentively and convey relevant information. In this work, we executed a user study to verify if primitive visual tasks can be performed pre-attentively. We tested how users could find: horizontal and vertical positions, length and slope of lines, size of areas, and color saturation intensity. Participants were presented with very simple visualizations, allowing us to assess accuracy and response time in interpreting the value being encoded in them. Our results showed that horizontal position identification is the most exact and quick task to do and showed that color saturation intensity identification is the worse task.

local_offer Research topics
person Candidate: João Pedro Lavadinho Moreira
supervisor_account Advisor: Prof. Daniel Jorge Viegas Gonçalves