Natural User Interfaces and Usability Studies

1
Natural User Interfaces and Usability Studies

• Janusz Sobecki

2
Agenda

• Introduction
• Interaction styles
• Natural user interfaces
• Usability studies
• Eye tracking
• Engine HCI research

3
Introduction

• The value of todays systems are dependent of
  their usability and UX quality,
• Natural user interfaces (NUI) are one of the
  interaction styles that are getting mora and more
  popular
• Aplication of NUI requires not only application
  of new types of input and output devices but also
  application of the new ways of design and
  usability veryfication

4
Interaction styles

• Interaction styles represent alternative design
  strategies for the user interface (UI)
• Each style defines its own way of organizing the
  system functionality
• We can distinguish at least several interaction
  styles categories

5
Interaction styles categories

• Key-modal
• Menu-based interaction
• Question-and-answer
• Function-key interaction
• Voice-based interaction
• Direct manipulation
• Graphical direct manipulation
• Forms fill-in
• Linguistic
• Command-line interaction
• Text-based natural language
• Virtual Reality
• Natural User Interfaces

6
Virtual reality definitions

• VR is an immersive and interactive simulation of
  either reality-based or imaginary images and
  scenes
• VR is a means of visualization, manipulation and
  interaction of a man-user with computers and
  complex data
• VR is something not formal and not real,
  however something that is true and existing
• VR is an application using different technologies
  such as HMD (Head Mounted Display), Glove Input
  Device, Body Suit and Auditory Devices

7
Natural User Interfaces

• NUI is a system for HCI that the user operates
  through intuitive actions related to natural,
  everyday human behavior
• NUI may be operated in many different ways,
  depending on the purpose and user requirements
• NUI may rely on intermediary devices for
  interaction, which are sometimes invisible to the
  user or so unobtrusive that they quickly seem
  invisible

8
Examples of NUIs

• Touch screens
• Kinetic interfaces
• Speach recognition systems
• Brain-machne interfaces

9
Usability

• Usability of a product, according to ISO 9241-11,
  is the extent to which the product can be used by
  specific users to achieve specific goals with
  effectiveness, efficiency, and satisfaction in a
  specific context of use.
• Effectiveness expresses the accuracy and
  completeness with which users achieve specified
  goals
• Efficiency considers the resources expended in
  relation to the accuracy and completeness with
  which users achieve goals
• Satisfaction reveals the users comfort and
  acceptability of use

10
Software usability ISO 9126
11
Usability veryfication methods

• There have been developed many different methods,
  which may be applied on different stages of the
  system development

12
Popular methods

• One of the most popular methods applied in the
  Test and measure phase are
• Diagnostic evaluation is user based evaluation of
  a working system, where the primary objective is
  to identify usability problems
• Heuristic evaluation where usability specialists
  judge whether each element of a user interface
  follows a list of established usability heuristics

13
Eyetracking

• Eyetracking is used as a meas of additonal method
  o the diagnostic evaluation
• Eyetracking - process of measuring either the
  point of gaze ("where we are looking") or the
  motion of an eye relative to the head
• Eyetracker - device for measuring eye positions
  and eye movement

14
Pupil and CR detection
15
Eyetracking devices (ASL, Tobii, SMI)
Tobii X2-60 Eyetracker
SMI 6D glasses
ASL Pan/Tilt i Head mounted tracker
16
Eyetracking analysis

• Gazetrail, heatmap, active regions

17
HCI Engine research

• Development of the new methods of interactions in
  Augmented Reality
• Development of the new VR devices
• Deveoplent of the new usability veryfication
  methods for natural interfaces
• We have already cooperate with industry (i.e.
  Aduma S.A.) and academia (University of Tampere,
  The E. Geppert Academy of Art and Design and
  Uniersity of Wroclaw)

18
Thank you for your attention!