Jung's term for an acausal connection between events that renders them meaningful to an observer, e.g., precognition, coincidences of dreams with independently (see independence) occurring events, the frequent cooccurrance of particular numerals within a short time period of a longer sequence. (Krippendorff)

"Synchronistic events offer us perceptions that may be useful in our psychological and spiritual growth and may reveal to us, through intuitive knowledge, that our lives have meaning." --Jean Shinoda Bolen, MD, The Tao of Psychology

Why Does Synchronicity Happen: various sources

Synchronicity reveals the meaningful connections between the subjective and objective world. Jung
Synchronistic events provide an immediate religious experience as a direct encounter with the compensatory patterning of events in nature as a whole, both inwardly and outwardly. Jung.
These events serve to nurture -support, protect and enhance- human life and spiritual growth. Peck. 1978. The Road Less Traveled.
It is unfathomable power [the fingers of the Morai (fate), or the providence of God] ordering the web of our inner and outer existence. Greene. 1984. The Astrology of Fate.
The First Insight Theory: Mysterious coincidences cause the reconsideration of the inherent mystery that surrounds our individual lives on this planet. Redfield. 1993. The Celestine Prophecy
They demonstrate the unity of psyche and matter, forcing us to transcend our rational, scientific, materialistic attitudes. Mansfield, 1995. Synchronicity, Science, and Soul-making.

Towards the end of his career, the Swiss psychologist Carl Jung postulated the term "synchronicity" as a concept serving to illuminate a specific type of relationship between interior states of consciousness and external events. With synchronicity, a meaningful coincidence occurs between one's internal state and the world outside. Jung titled a short work on the concept Synchronicity: An Acausal Connecting Principle, emphasizing his belief that the interrelationship between internal states of consciousness and the external world is not bound by cause and effect but something more nebulous to define, something like "meaning." Synchronicity is often used colloquially to refer to any random coincidence, such as shouting "four" as four geese fly overhead. If the event has no meaningful import for the individual then the event is simply a coincidence and not a synchronicity. Thus, stories of synchronicity often abound when people are in states of crisis, transformation, or pushed to extreme limits—meaningful times in life.

At the beginning of the twentieth century, Austrian biologist Paul Kammerer advanced his little-known but thought-provoking theory of "seriality." Kammerer supposed that events, objects, or occurrences of a like kind assemble together in space and time through unknown and acausal means. Kammerer defined seriality as "a lawful recurrence, or clustering, in time and space whereby individual members of the sequence-as far as can be ascertained by careful analysis-are not connected by the same active source."(1) Where Jung's synchronicity deals with the relationship between subjectivity and the external world, Kammerer's seriality is more concerned with patterns and groupings of objects that occur in the environment. Many of us have had the experience whereby we encounter a new word for the first time and, surprisingly, we encounter it numerous times after its initial introduction into our lives. For instance, someone rolls off a particularly mellifluous sounding word in conversation, "insouciant," that piques your curiosity but you have no idea of its meaning. Shortly after hearing it the first time, you read it in a book, someone else uses it in conversation-and someone else. This clustering of the word "insouciant" is an example of Kammerer's notion of seriality, and for Kammerer, much to his critic's disagreement, this patterning was not random but meaningful.


Meaningful coincidences were first logged and analyzed by Paul Kammerer who suggested that these events revealed a heretofore unrecognized law of nature which tended to bring like and like together. Jung carried the analysis further suggesting that the mind transcends our normal concepts of space and time. Realms of the psyche which he called archetypes, located in the collective unconscious, were somehow responsible for collecting or linking similar events which were not related by physical cause and effect energies but rather by meaning. Seifer introduced the term "kicker" to denote the extreme precision of the more spectacular synchronistic events, while Persinger speculated that the geomagnetic pulsations of the earth may somehow be involved in initiating or acting as carrier frequencies. If the world is constructed on holographic principles aligned with such concepts as Leibnitz's monad theory or Mach's Principle whereby in some derivative sense, each part codes for the whole, it is possible that properties inherent in holography may represent the physical part of this process, whereas synchronistic phenomena may be the mental counterpart.

A different approach to a theoretical (mathematical) model:

Seriality, Synchronicity and Complexity Science
(a pdf download) - view here as html or here to download as word file
by Michael A. Forster

Complexity science is used to explain Kammerer’s law of seriality and, by inference, Jung’s synchronicity. However, due to the nature of synchronicity this paper primarily focuses on seriality. A basic model, the Cardland model, is introduced and presented as a theoretical basis for seriality. Observational evidence of Kammerer’s seriality is then presented to demonstrate its relationship with complexity science. It is shown that the sequence of events under the law of seriality is self-organised and follows a power law distribution. The consequences for seriality and synchronicity are then discussed.




Charles Tart : Steps toward clarification of Synchronicity

Synchronicity references links

what is synchronicity?