Postural Responses

From EuroVR Knowledge Base

Description

The behavioural realism approach introduced by Freeman et al. (2000) is based on the principle that the more similar a display becomes to the environment it represents, the more observers will respond in the same way that they would respond to the environment itself. Postural responses are proposed as a presence measure. One advantage is that they are not mediated by high level cognitive processes, so are unlikely to affect concurrent subjective evaluation. A second advantage is the capacity to produce differential levels of response. Postural responses occur under the illusion of observer motion, or vection. It has been argued that measures of vection and presence should be related (Freeman et al., 2000; Ohmi, 1998); if a user experiences vection in an environment, s/he is more likely to feel present in that environment.

Primary Reference or Source

• Freeman, J., Avons, S., Meddis, R., Pearson, D., & IJsselsteijn, W. (2000). Using behavioural realism to estimate presence: A study of the utility of postural responses to motion stimuli. Presence: Teleoperators and Virtual Environments, 9, 149-164