Nelson, P. L. (1998). Consciousness: The final frontier. Paragate: A Journal of Consciousness and Spirituality, 1(2), 18-21.
Nelson, P. L. (1998). Mystical experience. Paragate: A Journal of Consciousness and Spirituality, 1(1), 6-9, 18.
Nelson, P. L. (1998). The seeker's shadow. Paragate: A Journal of Consciousness and Spirituality, 1(4), 12-13, 30.
Nelson, P. L. (1991). Transcending limitations: Spontaneous paranormal and spiritual experiences in Australian daily life. Australian Parapsychological Review, 2 & 3(18), 8-12.
Nelson, P. L. (2010). Altered States of Consciousness. In J. G. Melton & M. Baumann (Eds.), Religions of the World: A Comprehensive Encyclopedia of Beliefs and Practices (2nd ed., pp. 81-85). Santa Barbara, CA: ABC-CLIO.
Nelson, P. L. (2000). Mystical experience and radical deconstruction: Through the ontological looking glass. In T. Hart, P. Nelson, & K. Puhakka (Eds.). In Transpersonal knowing: Exploring the horizons of consciousness. New York: SUNY
Nelson, P. L. (1997-98). Consciousness as reflexive shadow: An operational psychophenomenological model. Imagination, Cognition and 215-228.
Nelson, P. L. (1995-96). Personality trait absorption: An exploratory study of opportunity and capacity in relation to cannabis use. Imagination, Cognition and Personality, 15(1), 75-101.
Nelson, P. L. (1994-95). Cannabis amotivational syndrome and personality trait absorption: A review and reconceptualization. Imagination, Cognition and Personality, 14(1), 43-58.
Nelson, P. L. (1993). A critical review of the research literature concerning some biological and psychological effects of cannabis. In Advisory Committee on Illicit Drugs (Eds.), Cannabis and the law in Queensland: A discussion paper (pp. 113-152). Brisbane: Criminal Justice Commission of Queensland.
Nelson, P. L. (1991-92). Personality attributes as discriminating factors in distinguishing religio-mystical from paranormal experients. Imagination, Cognition and Personality, 11(4), 389-405.
Nelson, P. L. (1990). The technology of the præternatural: An empirically based model of transpersonal experiences. The Journal of Transpersonal Psychology, 22, 35-50.
Nelson, P. L. (1989). A survey of mystical, visionary and remote perception experiences. In G. K. Zollschan, J. F. Schumaker, & G. F. Walsh (Eds.), Exploring the paranormal: Perspectives on belief and experience (pp. 184-214). Dorset, U.K.: Prism.
Nelson, P. L. (1989). Personality factors in the frequency of reported spontaneous præternatural experiences. The Journal of Transpersonal Psychology, 21, 193-209.
Nelson, P. L., & Hart, T. (2003). A survey of recalled childhood spiritual and non-ordinary experiences: Age, rate and psychological factors associated with their occurrence.
Howell, J. D. & Nelson, P. L., Cross-Cultural Adaptation: The Brahma Kumaris in the Western World
Howell, J. D. & Nelson, P. L., Surviving Transplantation: The Brahma Kumaris in the Western World
Nelson, P. L. & Howell, J. D. (1993-4). A psycho-social phenomenological methodology for conducting operational, ontologically neutral research into religious and altered state experiences. Journal for the Psychology of Religion, 2-3, 1-48.
Nelson, P. L. (1998). The Eastling House Residential Program: An Empirical Study of Perceived Effectiveness (internal research report). Christchurch, N.Z.: The Methodist Mission.
Nelson, P. L. (1997). The Future Markets Group (FMG)-Establishing User-Centered Research at TI. The Discovery of New Customers, New Products and New Markets (internal publication). Dallas: Texas Instruments Corporation.
Hart, T., Nelson, P. & Puhakka, K. (eds.) (2000). Transpersonal knowing: Exploring the horizons . New York: SUNY
Hart, T., Nelson, P. & Puhakka, K. (eds.) (1997). Spiritual knowing: Alternative Epistemic Perspectives. Carrollton, GA: State University of West Georgia Press.