degree of freedom immersion
  sensors force feedback world medium copy & paste
simulation space/movement body movement body memory auto-reflection
  effectors imaginative space structural coupling
  sensorama simulator sickness transitional objects last four inches
  vr concepts staging space outer world
  response cue
Human consciousness is actively and correctively involved in perception. When simulation allows for meaningful experiences, i.e. when motion sense and time experience are accepted as realistic, it is possible to tolerate and compensate differences between remembered and simulated perceptions.
Distracting auto-reflection can be left in the background when linked to the medium. It is then no longer obvious that bodily experience is taking place without a body.