“Altered State of Consciousness” (ASC) has been defined as a changed overall pattern of conscious experience, or as the subjective feeling and explicit recognition that one's own subjective experience has changed. We argue that these traditional definitions fail to draw a clear line between altered and normal states of consciousness (NSC). We outline a new definition of ASC and argue that the proper way to understand the concept of ASC is to regard it as a representational notion: the alteration that (...) has happened is not an alteration of consciousness (or subjective experience) per se, but an alteration in the informational or representational relationships between consciousness and the world. An altered state of consciousness is defined as a state in which the neurocognitive background mechanisms of consciousness have an increased tendency to produce misrepresentations such as hallucinations, delusions, and memory distortions. Paradigm examples of such generally misrepresentational, temporary, and reversible states are dreaming, psychotic episodes, psychedelic drug experiences, some epileptic seizures, and hypnosis in highly hypnotizable subjects. The representational definition of ASC should be applied in the theoretical and empirical studies of ASCs to unify and clarify the conceptual basis of ASC research. (shrink)

Anthropology of Consciousness, Volume 32, Issue 2, Page 182-207, Autumn 2021.

Felicitas Goodman (1990) observed that naive participants experienced unique trance states, characterized by specific visionary content, when they assumed particular postures and listened to monotonous rattling. Students (n = 284), enrolled in various sections of the course Introduction to Psychology, experienced one of four conditions with their eyes closed: Sitting Quietly with and without Drumming, Standing (Feather Serpent) Posture plus Drumming with and without Suggested Experiences. Participants completed the Phenomenology of Consciousness Inventory (Pekala 1982, 1991c) and wrote narratives following their (...) respective stimulus conditions. Participants reported less imagery, joy, and absorption, but more internal dialogue, self‐awareness, and muscular tension in the posture, compared to the sitting quietly, conditions. Goodman's results of specific posture (content‐related) effects with naive participants were not replicated. (shrink)

There has been a renewed interest in psychology and anthropology in the idea of altered states of consciousness. This paper begins by examining the meaning of this term and the extent to which such experiences are reported globally. The topic of shamanism is then discussed, first with respect to its social functions, and then to what is known about its psychological aspects (which is little). Far more is known about altered states of consciousness (ASCs) as they are expressed in meditation, (...) trance and possession, and channeling, and a number of studies are reviewed, both of individuals and of groups, which illustrate the full extent of ASCs. The following section then goes more deeply into the stimulus situations that are associated with ASCs. This brings the discussion into drugs, attempts at altering the sensorium (music and imagery in particular) and recent technological innovations, peculiar to our time, which deliberately alter our usual state of awareness through feedback principles. In the final section, what is known about the physiology of ASCs is reviewed and also the extent to which these phenomena, including shamanism, are regarded as pathological. As a great number of people across the world utilize the healing aspects of trance, possession and shamanic practices, this aspect is discussed, and lastly the adaptive functions of ASCs are considered, with their context in the history of psychology. (shrink)