Vr slides 23

Question 1

vr flaws (3)

Answer 1

locomotion, perception, lack of haptics

Question 2

engineers and vr developers want to know (4things)

Answer 2

which headset is better, which is more comfortable for longer periods, how much fov is enough, best way to interact with vr?

Question 3

short term, medium and long term adaptation exampsl

Answer 3

waterfall illusion, glasses, perceptual expertise

Question 4

small scale versus large scale neuroplasticity

Answer 4

change in synaptic potential vs cortical remapping

Question 5

examples of real world perceptual learning

Answer 5

radiologists/ blind and braile

Question 6

4 perceptual learning factors

Answer 6

attentional weighting, stimulus imprinting, differentialtion, unitization

Question 7

attentional weigthing

Answer 7

more focus on certian features than others

Question 8

stimulus imprinting

Answer 8

specialized receptors developed that identify part or all of relevant stimuli

Question 9

differentiation

Answer 9

different stimuli that were fused become spearated

Question 10

unitization

Answer 10

combine different stimuli into single response

Question 11

what can developer s be used for

Answer 11

to train evaluators to spot problems in vr

Question 12

what can users be used for

Answer 12

to accomodate imperfect vr to allow for meaningful interactions

Question 13

motor remapping

Answer 13

users can adapt existing motor programs

Question 14

how do developers detech visual vestibular conflict

Answer 14

examine stationarity

Question 15

canonical head movemetns detect errors in what 3 things

Answer 15

head tracking, latency, incorrect depth in viewpoint

Question 16

stereo error

Answer 16

eye closing trick

Question 17

pseudoscopic visions

Answer 17

concavity is reverse

Question 18

peripheral problems

Answer 18

observe distortions caused by looking through different parts of the lens

Question 19

4 recommendations for virtual worlds

Answer 19

use units that match real world, completely model objects, less locomotion, visual and auditory rendering

Question 20

6 recommendations for visual rendering

Answer 20

dont fix objects on a screen, reconsider texture mapping and antialiasing, maintain high framerate of 90fps, avoid viewponit changes not matching head, dont render close, use correct ipd, reduce contrast and brightness

Question 21

5 recommendations for tracking

Answer 21

dont freeze head tracking, make viewpoints correctly located, beware of real world obstacles, use chaperone, when approach border reduce contrast

Question 22

4 recommendations for interacton

Answer 22

consider superhuman powers like teleportaiton, minimize vection during locomotion, avoid gorilla arms, avoid uncanney valley

Question 23

3 recommendations for intefaces

Answer 23

floating menus rendered not close bc vergence accomoatio, minimize size of menu, embed ui in virtual world

Question 24

4 recommendaitons for audio

Answer 24

difference between headphone and external, auralization account for orientation and position ofuser, doppler effect provide stronng motion cue, geometric audio rendering can be simpler

Question 25

5 recommendations for self appearance

Answer 25

higher presenece if see self, simple virtual body better, difference between vr and real body be disconcerting, if only head tracking, body should be subject to basic kinematic constraints, self appearance affects social behavior

Question 26

2 malfunctions inducing sickenss

Answer 26

latency for visual rendering, improper ipd

Question 27

2 badly designed experiences leading to sickness

Answer 27

vection (illusion of self motion), optical flow indicates acceleration but no vestbular or propioceptive, apparent during locomotion

Question 28

vr sickness symptopms

Answer 28

nausea, dizzy, fatigue, drowsiness, sweats, pallor, headache, eye strain blurred viison warmth salviation

Question 29

sickness variation among users

Answer 29

80% mild symptoms experiences, females and children under 12 and chinese more likely,

Question 30

measure vr sickness with waht

Answer 30

ssq questionnaire, and physiolgoical = ecg,egg, eog, ppg, heart rate, galvanic skin response, skin apllor, head motion

Question 31

reduce vr sickness with 3 techniques

Answer 31

minimize vection, reduce locomotion, use locomotion techniques generate vestibular and propioceptive feedback - walking in place