Reevaluating stereo and motion cues for visualizing graphs in three dimensions
The goal was to examine the effect of stereo, kinetic or motion depth and the use of 3D tubes versus lines, on understanding of graphs.
Variables and Constants
- stereoscopy - on or off
- motion - a second condition was motion. the graph was either static or rotated smoothly, taking 36 seconds to complete a rotation.
- rendering style - a second condition was motion. the graph was either static or rotated smoothly, taking 36 seconds to complete a rotation.
- graph size - 33, 100, 333 and 1000 nodes
Since the display remained the same, FOV, display size and form factor, resolution, latency, pixel density, refresh rate, frame rate, and other display factors remained constant.
- mouse - the mouse was used for the participant to answer task-related questions.
4 PCs, each with an NVidia Quadro FX 3000G and an AMD Anthalon PX51 3400 processor with speeds of 2400 MHz, powered both displays. It appears from the images that the mirror projection is covering the maximum FOV of human perception.
15 participants were undergraduate students. 2 were the authors to get an estimate of what experienced observers would find.
|Total #||Age Range||Gender Balance|
Two nodes in the graph were highlighted in red, and participants were asked whether they were linked by a path of 2 or 3.
The density varied depending on the graph size, which had anywhere from 33 to 1000 nodes.
|3D||Not reported||Controlled variable||Low|
There was a significant interaction between stereoscopy and motion on accuracy for a comprehension of spatial information task.
Stereo & motion cues led to less error rates than having no cues or one of the other for 3D graph understanding tasks.
There was a significant interaction between stereoscopy and motion on time for a comprehension of spatial information task.
Stereo & motion cues led to faster response times than having no cues or one of the other for 3D graph understanding tasks. In addition, Both stereo and motion cues and stereo led to faster response times than non-stereo conditions for graph understandi
The second result was stronger than the rest, since it was a result of a post hoc Tukey test in addition to an ANOVA. Teh authors found 15% speedup.