Singer, M. J., & Witmer, B. G. (1999). On selecting the right yardstick. Presence: Teleoperators and Virtual Environments, 8(5), 566–573.
Added by: Mark Grimshaw-Aagaard 06/08/2018, 10:24
Witmer, B. G., & Singer, M. J. (1998). Measuring presence in virtual environments: A presence questionnaire. Presence: Teleoperators and Virtual Environments, 7(3), 225–240.
Added by: Mark Grimshaw-Aagaard Last edited by: Mark Grimshaw-Aagaard 11/09/2018, 17:16