Experimental study of ostensibly shamanic journeying imagery in naďve participants II: phenomenological mapping and modified affect bridge

This study develops the methodological framework advanced in Rock, Baynes, and Casey's (2005) experimental study of ostensibly shamanic journeying imagery in naïve participants. Specifically, the present study experimentally investigates the impact of the word landscape, featured in Harner's (1990) shamanic journeying to the Lower World instructions, on the number of landscape-related images reported; examines the origins of ostensibly shamanic journeying images; and maps the phenomenological state effects of shamanic journeying to the Lower World. Sixtyeight naïve participants were randomly assigned to one of three conditions: either the original or a revised version of Harner's (1990) instructions coupled with monotonous percussion drumming at 8 beats-per-second for 15 minutes, or sitting quietly with eyes open for 15 minutes. Each participant's subjective experience was retrospectively assessed using the Phenomenology of Consciousness Inventory (PCI) (Pekala 1991) and a mental imagery checklist. Subsequently, participants were administered the Modified Affect Bridge for the purpose of exploring the origins of mental imagery experienced during the experimental conditions. The results indicated that there was a statistically significant difference between conditions with regard to the number of ostensibly shamanic journeying images reported, but not between treatment conditions with regard to the number of landscaperelated images reported. There were no significant relationships between condition and mental imagery derived from autobiographical memories. There were statistically significant differences between conditions with regard to the PCI dimensions of fear, altered state of awareness, and arousal.