Evaluation of take-over techniques for limited interaction resources

Objectives: Determine the preferred take-

over technique Evaluate the impact on the task

completion performance Evaluate the user acceptance of

proposed take-over techniques

Experimental setup

GUI

Users

Hardware:

Steerable Camera Projector

Microphone headsets

Portable Display Surface

Software:

Speech detector [D. Vaufreydaz]

Conversation modeling [J. Maisonnaisse]

Finger tracking [J. Letessier]

PDS tracking

Drawing application

The task

Collaborative reconstruction of a graph

The User Interface

Experimental conditions

The proposed take-over techniques: None – fixed interface (the reference) Explicit touch-based steering Explicit direct manipulation take-over Implicit voice-based steering

Explicit touch-based steering

Explicit direct manipulation

Implicit voice-based steering

Rules controlling the interface location:• Interface is steered toward

the “main speaker”• Interruptions are ignored• Drawing inhibits vocal steering• Conflicts result in loss of interface

control

Results

ResultsThe preference:#1 button-based control #2 the PDS#3 fixed interface #4 voice-based control

0

5

10

15

20

25

30

35

40

45

fixed button pds voice

Results

0

10

20

30

40

50

60

70

80

90

100

fixed button pds voice

preference

recall score