References
- Brown, D.P. (1977). A model for the levels of concentration meditation. International Journal of Clinical and Experimental Hypnosis, 25, 266–273. 10.1080/00207147708415993
- Brown, D.P. (1986). The stages of meditation in cross-cultural perspective. In K. Wilber, J. Engler & D.P. Brown (Eds.), Transformations of consciousness: Conventional and contemplative perspectives on development (pp. 17–52). Boston, MA: New Science Library.
- Halwes, T. (1974). Structural realism, coalitions and relationship of Gibsonian, constructivist and Buddhist theories of perception. In W.B. Weimer & D.S. Palermo (Eds.), Cognition and the symbolic processes (pp. 367–383). New York: Lawrence Erlbaum.
- Meissner, W.W. (1999). To the greater glory: A psychological study of Ignatian spirituality. Milwaukee, WI: Marquette University Press.
- Watts, F. (2013). Dual system theories of religious cognition. In F. Watts & G. Dumbreck (Eds.), Head and heart: Perspectives from religion and psychology (pp. 139–173). West Conshohoken, PA: Templeton Press.
- Watts, F. ( in press). Religion and the emergence of differentiated cognition. In F. Watts & L. Turner (Eds.), Evolution, religion and cognitive science: Critical inquiries. Oxford: Oxford University Press.
- Watts, F., & Williams, M. (1988). The psychology of religious knowing. Cambridge: Cambridge University Press.