Acquiring and pointing

Abstract

Research literature has shown that pen tilt is a promising input modality in pen-based interaction. However, the human capability to control pen tilt has not been fully evaluated. This paper systematically investigates the human ability to perform discrete target selection tasks by varying the pen stylus' tilt angle through two controlled experiments: tilt acquiring (Experiment 1) and tilt pointing (Experiment 2). Results revealed a decreasing power relationship between angular width and selection time in Experiment 1. The results of Experiment 2 confirmed that pen tilt pointing can be modeled by Fitts' law. Based on our quantitative analysis, we discuss the human ability to control pen tilt and the implications of pen tilt use. We also propose a taxonomy of pen tilt based interaction techniques and showcase a series of possible pen tilt technique designs.

Arc-Type and Tilt-Type: Pen-based Immersive Text Input for Room-Scale VR

“…Our results are consistent with the lower throughput of angular selection. In a controlled study of pen-tilt interaction with surfaces, Xin et al [58] found a decreasing power relationship between angular width and selection time. Tilt-Type's angular width to change between bins and characters is quite small to reduce the motion needed by the fingers.…”

Applying Pen Pressure, Tilt and Touch Interactions to Data Visualizations

“…. $15.00 https://doi.org/10.1145/3380867.3426198 tilt can also be used for novel interactions [3,7,10]. Thus, which interactions can be promoted through the combination of other pen data, like pressure or tilt, touch input is still an open issue.…”

The Influence of Flexural Stiffness on the Performance and Preference of Bendable Stylus Interfaces

“…Prior research explored various forms of auxiliary input such as rolling [8,21,23], pressure [11,17,45,46], tilt [21,56,60], and bend [17,18] that go beyond tracking the X-Y position of the pen tip on the screen [8,61]. Pen rolling utilizes the 3D rotation of the pen along its longitudinal axis as an input [8].…”

“…Pen tilt is different than pressure and rolling because tilt can be visually indicated by looking at the angle of the pens barrel relative to the surface of the screen. It is much more difficult to visualize a variable of pressure or the angle at which you are rolling a pen [60].…”

“…Xiangshi et al [60] conducted two experiments on evaluating the human ability to control and perform selection tasks with pen tilt. Their first experiment assessed how well a user can acquire a target using pen tilt.…”