Methods

There were 20 adult volunteers (16 male, 4 female) all but 1 naive to the experimental hypothesis. Fifteen reported more than 10 minutes prior experience with virtual environments. General data about participants are given in Table 4.2.

  

Table 4.2: Participant Overview for Experiments AIE1

Id	Gn	Age	Prev
1	M	41	1
2	M	29	0
3	M	43	1
4	M	42	1
5	M	26	1
6	M	36	1
7	M	29	1
8	F	40	1
9	M	27	1
10	M	34	1
11	F	43	0
12	M	25	1
13	M	36	0
14	M	21	0
15	F	27	1
16	M	27	0
17	M	27	1
18	F	38	1
19	M	53	1
20	M	48	1

Id is the participant number. Gn gives the gender, Age the age in years, and Prev is ``1'' if the participant had more than 10 minutes of prior experience in virtual environments, ``0'' otherwise.

For general methods, including the image used and how the per-exposure presence ratings were taken, see Section 4.2. Participants were given a one-minute pre-exposure to each condition, in random order, during which they were asked to examine the scene and gather their impressions. Subsequently, per-exposure presence ratings were taken for each condition in an independent random order.

Three FOV conditions were compared: 16$^{\circ}$, 32$^{\circ}$, and 48$^{\circ}$ (the widest available on the HMD used). FOV was restricted by blacking pixels around the boundary of the display (by the same proportion vertically as horizontally).

Human Interface Technology Lab