“…Dream-based images can also be approached through the concept of contextual imagery—a powerful central image in a dream that provides an image-based context for the dominant emotion of the dreamer (Hartmann, 2010). Current dream content studies indicate that the typical characteristics of dream imagery include continuity with experience, individual uniqueness, bizarreness, metaphorical content requiring interpretation, emotion (predominately negative), associative memories, representational imagery and symbolism, as well as the characteristics of salience and transcendence (Pagel, 2014). Petroglyph images can be analyzed as to the presence or absence of such dream-associated phenomenological characteristics, in an attempt to potentially discover which images are most likely to have been derived from dream.…”