As a {researcher}, I want to {define the output metrics of the user experiments} in order to {get the answers on the initial goals}.

[sassatelli]

• quantity of head motion
• re-buffering ratio/duration
• startup delay
• consumed bw
• QoE output metrics -- physical comfort (need to wring the neck), presence, immersion (one factor of presence, see below), visual discomfort, sickness/dizziness, enjoyment, ease to follow the story, identification of critical elements (pool, etc.)

Outputs:

• implementation of the objective metrics
• design of the exact questionnaire for subjective metrics
• documentation on both items above

Refs:

• Savino's report
• Evaluation criteria in Human Virtual Environment Interactions: https://scholar.google.com/citations?hl=fr&user=WwtbyKEAAAAJ&view_op=list_works&sortby=pubdate&cstart=20&pagesize=20 https://en.wikipedia.org/wiki/ISO_9241