Ergonomics of virtual environments for clinical use

Area of Science:

• Human-Computer Interaction (HCI)
• Virtual Environments (VE)
• Usability Engineering

Background:

• Usability is defined by ISO 9241-11 as effectiveness, efficiency, and satisfaction in achieving objectives within a specific environment.
• Current Human-Computer Interaction (HCI) trends emphasize context-specific technology evaluation.
• Virtual Environments (VE) are increasingly used in therapeutic settings, requiring careful usability assessment.

Purpose of the Study:

• To evaluate the usability of a Virtual Environment (VE) designed for the treatment of male sexual dysfunctions.
• To analyze user interactions within the VE, considering the entire environment, not just the virtual space.
• To assess the effectiveness of the VE based on designer-intended goals and meanings.

Main Methods:

• Adoption of a conceptual framework for VE evaluation.
• Analysis of "situated actions" within the VE.
• Examination of four key aspects: concurrent settings, symbol comprehension, user-guide relationship, and interaction breakdowns.

Main Results:

• The study analyzes the interplay of concurrent settings during virtual sessions.
• User comprehension of symbols within the VE is assessed.
• The structure of the user-guide relationship is examined.
• Breakdowns in human-VE interaction are identified and analyzed.

Conclusions:

• The evaluation parameters are derived from the designers' goals and intended meanings for the simulation.
• Understanding situated actions is crucial for assessing VE usability in therapeutic contexts.
• This approach moves beyond viewing VEs as isolated spaces, integrating them into the user's broader environment.